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Merge tag 'gpio-v3.13-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
[linux-2.6.git] / drivers / s390 / scsi / zfcp_fsf.c
blob0fe8d5d951196425871d958c4003f773f8c4a3e2
1 /*
2 * zfcp device driver
3 *
4 * Implementation of FSF commands.
5 *
6 * Copyright IBM Corp. 2002, 2013
7 */
8
9 #define KMSG_COMPONENT "zfcp"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
12 #include <linux/blktrace_api.h>
13 #include <linux/slab.h>
14 #include <scsi/fc/fc_els.h>
15 #include "zfcp_ext.h"
16 #include "zfcp_fc.h"
17 #include "zfcp_dbf.h"
18 #include "zfcp_qdio.h"
19 #include "zfcp_reqlist.h"
20
21 struct kmem_cache *zfcp_fsf_qtcb_cache;
22
23 static void zfcp_fsf_request_timeout_handler(unsigned long data)
24 {
25 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
26 zfcp_qdio_siosl(adapter);
27 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
28 "fsrth_1");
29 }
30
31 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
32 unsigned long timeout)
33 {
34 fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
35 fsf_req->timer.data = (unsigned long) fsf_req->adapter;
36 fsf_req->timer.expires = jiffies + timeout;
37 add_timer(&fsf_req->timer);
38 }
39
40 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
41 {
42 BUG_ON(!fsf_req->erp_action);
43 fsf_req->timer.function = zfcp_erp_timeout_handler;
44 fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
45 fsf_req->timer.expires = jiffies + 30 * HZ;
46 add_timer(&fsf_req->timer);
47 }
48
49 /* association between FSF command and FSF QTCB type */
50 static u32 fsf_qtcb_type[] = {
51 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
52 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
53 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
54 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
55 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
56 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
57 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
58 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
59 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
60 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
61 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
62 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
63 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
64 };
65
66 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
67 {
68 dev_err(&req->adapter->ccw_device->dev, "FCP device not "
69 "operational because of an unsupported FC class\n");
70 zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1");
71 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
72 }
73
74 /**
75 * zfcp_fsf_req_free - free memory used by fsf request
76 * @fsf_req: pointer to struct zfcp_fsf_req
77 */
78 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
79 {
80 if (likely(req->pool)) {
81 if (likely(req->qtcb))
82 mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
83 mempool_free(req, req->pool);
84 return;
85 }
86
87 if (likely(req->qtcb))
88 kmem_cache_free(zfcp_fsf_qtcb_cache, req->qtcb);
89 kfree(req);
90 }
91
92 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
93 {
94 unsigned long flags;
95 struct fsf_status_read_buffer *sr_buf = req->data;
96 struct zfcp_adapter *adapter = req->adapter;
97 struct zfcp_port *port;
98 int d_id = ntoh24(sr_buf->d_id);
99
100 read_lock_irqsave(&adapter->port_list_lock, flags);
101 list_for_each_entry(port, &adapter->port_list, list)
102 if (port->d_id == d_id) {
103 zfcp_erp_port_reopen(port, 0, "fssrpc1");
104 break;
105 }
106 read_unlock_irqrestore(&adapter->port_list_lock, flags);
107 }
108
109 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req,
110 struct fsf_link_down_info *link_down)
111 {
112 struct zfcp_adapter *adapter = req->adapter;
113
114 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
115 return;
116
117 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
118
119 zfcp_scsi_schedule_rports_block(adapter);
120
121 if (!link_down)
122 goto out;
123
124 switch (link_down->error_code) {
125 case FSF_PSQ_LINK_NO_LIGHT:
126 dev_warn(&req->adapter->ccw_device->dev,
127 "There is no light signal from the local "
128 "fibre channel cable\n");
129 break;
130 case FSF_PSQ_LINK_WRAP_PLUG:
131 dev_warn(&req->adapter->ccw_device->dev,
132 "There is a wrap plug instead of a fibre "
133 "channel cable\n");
134 break;
135 case FSF_PSQ_LINK_NO_FCP:
136 dev_warn(&req->adapter->ccw_device->dev,
137 "The adjacent fibre channel node does not "
138 "support FCP\n");
139 break;
140 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
141 dev_warn(&req->adapter->ccw_device->dev,
142 "The FCP device is suspended because of a "
143 "firmware update\n");
144 break;
145 case FSF_PSQ_LINK_INVALID_WWPN:
146 dev_warn(&req->adapter->ccw_device->dev,
147 "The FCP device detected a WWPN that is "
148 "duplicate or not valid\n");
149 break;
150 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
151 dev_warn(&req->adapter->ccw_device->dev,
152 "The fibre channel fabric does not support NPIV\n");
153 break;
154 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
155 dev_warn(&req->adapter->ccw_device->dev,
156 "The FCP adapter cannot support more NPIV ports\n");
157 break;
158 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
159 dev_warn(&req->adapter->ccw_device->dev,
160 "The adjacent switch cannot support "
161 "more NPIV ports\n");
162 break;
163 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
164 dev_warn(&req->adapter->ccw_device->dev,
165 "The FCP adapter could not log in to the "
166 "fibre channel fabric\n");
167 break;
168 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
169 dev_warn(&req->adapter->ccw_device->dev,
170 "The WWPN assignment file on the FCP adapter "
171 "has been damaged\n");
172 break;
173 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
174 dev_warn(&req->adapter->ccw_device->dev,
175 "The mode table on the FCP adapter "
176 "has been damaged\n");
177 break;
178 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
179 dev_warn(&req->adapter->ccw_device->dev,
180 "All NPIV ports on the FCP adapter have "
181 "been assigned\n");
182 break;
183 default:
184 dev_warn(&req->adapter->ccw_device->dev,
185 "The link between the FCP adapter and "
186 "the FC fabric is down\n");
187 }
188 out:
189 zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
190 }
191
192 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
193 {
194 struct fsf_status_read_buffer *sr_buf = req->data;
195 struct fsf_link_down_info *ldi =
196 (struct fsf_link_down_info *) &sr_buf->payload;
197
198 switch (sr_buf->status_subtype) {
199 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
200 zfcp_fsf_link_down_info_eval(req, ldi);
201 break;
202 case FSF_STATUS_READ_SUB_FDISC_FAILED:
203 zfcp_fsf_link_down_info_eval(req, ldi);
204 break;
205 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
206 zfcp_fsf_link_down_info_eval(req, NULL);
207 };
208 }
209
210 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
211 {
212 struct zfcp_adapter *adapter = req->adapter;
213 struct fsf_status_read_buffer *sr_buf = req->data;
214
215 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
216 zfcp_dbf_hba_fsf_uss("fssrh_1", req);
217 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
218 zfcp_fsf_req_free(req);
219 return;
220 }
221
222 zfcp_dbf_hba_fsf_uss("fssrh_4", req);
223
224 switch (sr_buf->status_type) {
225 case FSF_STATUS_READ_PORT_CLOSED:
226 zfcp_fsf_status_read_port_closed(req);
227 break;
228 case FSF_STATUS_READ_INCOMING_ELS:
229 zfcp_fc_incoming_els(req);
230 break;
231 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
232 break;
233 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
234 dev_warn(&adapter->ccw_device->dev,
235 "The error threshold for checksum statistics "
236 "has been exceeded\n");
237 zfcp_dbf_hba_bit_err("fssrh_3", req);
238 break;
239 case FSF_STATUS_READ_LINK_DOWN:
240 zfcp_fsf_status_read_link_down(req);
241 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKDOWN, 0);
242 break;
243 case FSF_STATUS_READ_LINK_UP:
244 dev_info(&adapter->ccw_device->dev,
245 "The local link has been restored\n");
246 /* All ports should be marked as ready to run again */
247 zfcp_erp_set_adapter_status(adapter,
248 ZFCP_STATUS_COMMON_RUNNING);
249 zfcp_erp_adapter_reopen(adapter,
250 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
251 ZFCP_STATUS_COMMON_ERP_FAILED,
252 "fssrh_2");
253 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKUP, 0);
254
255 break;
256 case FSF_STATUS_READ_NOTIFICATION_LOST:
257 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
258 zfcp_fc_conditional_port_scan(adapter);
259 break;
260 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
261 adapter->adapter_features = sr_buf->payload.word[0];
262 break;
263 }
264
265 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
266 zfcp_fsf_req_free(req);
267
268 atomic_inc(&adapter->stat_miss);
269 queue_work(adapter->work_queue, &adapter->stat_work);
270 }
271
272 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
273 {
274 switch (req->qtcb->header.fsf_status_qual.word[0]) {
275 case FSF_SQ_FCP_RSP_AVAILABLE:
276 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
277 case FSF_SQ_NO_RETRY_POSSIBLE:
278 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
279 return;
280 case FSF_SQ_COMMAND_ABORTED:
281 break;
282 case FSF_SQ_NO_RECOM:
283 dev_err(&req->adapter->ccw_device->dev,
284 "The FCP adapter reported a problem "
285 "that cannot be recovered\n");
286 zfcp_qdio_siosl(req->adapter);
287 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1");
288 break;
289 }
290 /* all non-return stats set FSFREQ_ERROR*/
291 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
292 }
293
294 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
295 {
296 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
297 return;
298
299 switch (req->qtcb->header.fsf_status) {
300 case FSF_UNKNOWN_COMMAND:
301 dev_err(&req->adapter->ccw_device->dev,
302 "The FCP adapter does not recognize the command 0x%x\n",
303 req->qtcb->header.fsf_command);
304 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1");
305 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
306 break;
307 case FSF_ADAPTER_STATUS_AVAILABLE:
308 zfcp_fsf_fsfstatus_qual_eval(req);
309 break;
310 }
311 }
312
313 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
314 {
315 struct zfcp_adapter *adapter = req->adapter;
316 struct fsf_qtcb *qtcb = req->qtcb;
317 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
318
319 zfcp_dbf_hba_fsf_response(req);
320
321 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
322 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
323 return;
324 }
325
326 switch (qtcb->prefix.prot_status) {
327 case FSF_PROT_GOOD:
328 case FSF_PROT_FSF_STATUS_PRESENTED:
329 return;
330 case FSF_PROT_QTCB_VERSION_ERROR:
331 dev_err(&adapter->ccw_device->dev,
332 "QTCB version 0x%x not supported by FCP adapter "
333 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
334 psq->word[0], psq->word[1]);
335 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1");
336 break;
337 case FSF_PROT_ERROR_STATE:
338 case FSF_PROT_SEQ_NUMB_ERROR:
339 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2");
340 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
341 break;
342 case FSF_PROT_UNSUPP_QTCB_TYPE:
343 dev_err(&adapter->ccw_device->dev,
344 "The QTCB type is not supported by the FCP adapter\n");
345 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3");
346 break;
347 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
348 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
349 &adapter->status);
350 break;
351 case FSF_PROT_DUPLICATE_REQUEST_ID:
352 dev_err(&adapter->ccw_device->dev,
353 "0x%Lx is an ambiguous request identifier\n",
354 (unsigned long long)qtcb->bottom.support.req_handle);
355 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4");
356 break;
357 case FSF_PROT_LINK_DOWN:
358 zfcp_fsf_link_down_info_eval(req, &psq->link_down_info);
359 /* go through reopen to flush pending requests */
360 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6");
361 break;
362 case FSF_PROT_REEST_QUEUE:
363 /* All ports should be marked as ready to run again */
364 zfcp_erp_set_adapter_status(adapter,
365 ZFCP_STATUS_COMMON_RUNNING);
366 zfcp_erp_adapter_reopen(adapter,
367 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
368 ZFCP_STATUS_COMMON_ERP_FAILED,
369 "fspse_8");
370 break;
371 default:
372 dev_err(&adapter->ccw_device->dev,
373 "0x%x is not a valid transfer protocol status\n",
374 qtcb->prefix.prot_status);
375 zfcp_qdio_siosl(adapter);
376 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9");
377 }
378 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
379 }
380
381 /**
382 * zfcp_fsf_req_complete - process completion of a FSF request
383 * @fsf_req: The FSF request that has been completed.
384 *
385 * When a request has been completed either from the FCP adapter,
386 * or it has been dismissed due to a queue shutdown, this function
387 * is called to process the completion status and trigger further
388 * events related to the FSF request.
389 */
390 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
391 {
392 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
393 zfcp_fsf_status_read_handler(req);
394 return;
395 }
396
397 del_timer(&req->timer);
398 zfcp_fsf_protstatus_eval(req);
399 zfcp_fsf_fsfstatus_eval(req);
400 req->handler(req);
401
402 if (req->erp_action)
403 zfcp_erp_notify(req->erp_action, 0);
404
405 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
406 zfcp_fsf_req_free(req);
407 else
408 complete(&req->completion);
409 }
410
411 /**
412 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
413 * @adapter: pointer to struct zfcp_adapter
414 *
415 * Never ever call this without shutting down the adapter first.
416 * Otherwise the adapter would continue using and corrupting s390 storage.
417 * Included BUG_ON() call to ensure this is done.
418 * ERP is supposed to be the only user of this function.
419 */
420 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
421 {
422 struct zfcp_fsf_req *req, *tmp;
423 LIST_HEAD(remove_queue);
424
425 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
426 zfcp_reqlist_move(adapter->req_list, &remove_queue);
427
428 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
429 list_del(&req->list);
430 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
431 zfcp_fsf_req_complete(req);
432 }
433 }
434
435 #define ZFCP_FSF_PORTSPEED_1GBIT (1 << 0)
436 #define ZFCP_FSF_PORTSPEED_2GBIT (1 << 1)
437 #define ZFCP_FSF_PORTSPEED_4GBIT (1 << 2)
438 #define ZFCP_FSF_PORTSPEED_10GBIT (1 << 3)
439 #define ZFCP_FSF_PORTSPEED_8GBIT (1 << 4)
440 #define ZFCP_FSF_PORTSPEED_16GBIT (1 << 5)
441 #define ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED (1 << 15)
442
443 static u32 zfcp_fsf_convert_portspeed(u32 fsf_speed)
444 {
445 u32 fdmi_speed = 0;
446 if (fsf_speed & ZFCP_FSF_PORTSPEED_1GBIT)
447 fdmi_speed |= FC_PORTSPEED_1GBIT;
448 if (fsf_speed & ZFCP_FSF_PORTSPEED_2GBIT)
449 fdmi_speed |= FC_PORTSPEED_2GBIT;
450 if (fsf_speed & ZFCP_FSF_PORTSPEED_4GBIT)
451 fdmi_speed |= FC_PORTSPEED_4GBIT;
452 if (fsf_speed & ZFCP_FSF_PORTSPEED_10GBIT)
453 fdmi_speed |= FC_PORTSPEED_10GBIT;
454 if (fsf_speed & ZFCP_FSF_PORTSPEED_8GBIT)
455 fdmi_speed |= FC_PORTSPEED_8GBIT;
456 if (fsf_speed & ZFCP_FSF_PORTSPEED_16GBIT)
457 fdmi_speed |= FC_PORTSPEED_16GBIT;
458 if (fsf_speed & ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED)
459 fdmi_speed |= FC_PORTSPEED_NOT_NEGOTIATED;
460 return fdmi_speed;
461 }
462
463 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
464 {
465 struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
466 struct zfcp_adapter *adapter = req->adapter;
467 struct Scsi_Host *shost = adapter->scsi_host;
468 struct fc_els_flogi *nsp, *plogi;
469
470 /* adjust pointers for missing command code */
471 nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
472 - sizeof(u32));
473 plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
474 - sizeof(u32));
475
476 if (req->data)
477 memcpy(req->data, bottom, sizeof(*bottom));
478
479 fc_host_port_name(shost) = nsp->fl_wwpn;
480 fc_host_node_name(shost) = nsp->fl_wwnn;
481 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
482
483 adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK;
484 adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
485 (u16)FSF_STATUS_READS_RECOM);
486
487 if (fc_host_permanent_port_name(shost) == -1)
488 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
489
490 zfcp_scsi_set_prot(adapter);
491
492 /* no error return above here, otherwise must fix call chains */
493 /* do not evaluate invalid fields */
494 if (req->qtcb->header.fsf_status == FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE)
495 return 0;
496
497 fc_host_port_id(shost) = ntoh24(bottom->s_id);
498 fc_host_speed(shost) =
499 zfcp_fsf_convert_portspeed(bottom->fc_link_speed);
500
501 adapter->hydra_version = bottom->adapter_type;
502
503 switch (bottom->fc_topology) {
504 case FSF_TOPO_P2P:
505 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
506 adapter->peer_wwpn = plogi->fl_wwpn;
507 adapter->peer_wwnn = plogi->fl_wwnn;
508 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
509 break;
510 case FSF_TOPO_FABRIC:
511 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
512 break;
513 case FSF_TOPO_AL:
514 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
515 /* fall through */
516 default:
517 dev_err(&adapter->ccw_device->dev,
518 "Unknown or unsupported arbitrated loop "
519 "fibre channel topology detected\n");
520 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1");
521 return -EIO;
522 }
523
524 return 0;
525 }
526
527 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
528 {
529 struct zfcp_adapter *adapter = req->adapter;
530 struct fsf_qtcb *qtcb = req->qtcb;
531 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
532 struct Scsi_Host *shost = adapter->scsi_host;
533
534 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
535 return;
536
537 adapter->fsf_lic_version = bottom->lic_version;
538 adapter->adapter_features = bottom->adapter_features;
539 adapter->connection_features = bottom->connection_features;
540 adapter->peer_wwpn = 0;
541 adapter->peer_wwnn = 0;
542 adapter->peer_d_id = 0;
543
544 switch (qtcb->header.fsf_status) {
545 case FSF_GOOD:
546 if (zfcp_fsf_exchange_config_evaluate(req))
547 return;
548
549 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
550 dev_err(&adapter->ccw_device->dev,
551 "FCP adapter maximum QTCB size (%d bytes) "
552 "is too small\n",
553 bottom->max_qtcb_size);
554 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1");
555 return;
556 }
557 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
558 &adapter->status);
559 break;
560 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
561 fc_host_node_name(shost) = 0;
562 fc_host_port_name(shost) = 0;
563 fc_host_port_id(shost) = 0;
564 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
565 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
566 adapter->hydra_version = 0;
567
568 /* avoids adapter shutdown to be able to recognize
569 * events such as LINK UP */
570 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
571 &adapter->status);
572 zfcp_fsf_link_down_info_eval(req,
573 &qtcb->header.fsf_status_qual.link_down_info);
574 if (zfcp_fsf_exchange_config_evaluate(req))
575 return;
576 break;
577 default:
578 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
579 return;
580 }
581
582 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
583 adapter->hardware_version = bottom->hardware_version;
584 memcpy(fc_host_serial_number(shost), bottom->serial_number,
585 min(FC_SERIAL_NUMBER_SIZE, 17));
586 EBCASC(fc_host_serial_number(shost),
587 min(FC_SERIAL_NUMBER_SIZE, 17));
588 }
589
590 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
591 dev_err(&adapter->ccw_device->dev,
592 "The FCP adapter only supports newer "
593 "control block versions\n");
594 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4");
595 return;
596 }
597 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
598 dev_err(&adapter->ccw_device->dev,
599 "The FCP adapter only supports older "
600 "control block versions\n");
601 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5");
602 }
603 }
604
605 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
606 {
607 struct zfcp_adapter *adapter = req->adapter;
608 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
609 struct Scsi_Host *shost = adapter->scsi_host;
610
611 if (req->data)
612 memcpy(req->data, bottom, sizeof(*bottom));
613
614 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
615 fc_host_permanent_port_name(shost) = bottom->wwpn;
616 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
617 } else
618 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
619 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
620 fc_host_supported_speeds(shost) =
621 zfcp_fsf_convert_portspeed(bottom->supported_speed);
622 memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
623 FC_FC4_LIST_SIZE);
624 memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
625 FC_FC4_LIST_SIZE);
626 }
627
628 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
629 {
630 struct fsf_qtcb *qtcb = req->qtcb;
631
632 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
633 return;
634
635 switch (qtcb->header.fsf_status) {
636 case FSF_GOOD:
637 zfcp_fsf_exchange_port_evaluate(req);
638 break;
639 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
640 zfcp_fsf_exchange_port_evaluate(req);
641 zfcp_fsf_link_down_info_eval(req,
642 &qtcb->header.fsf_status_qual.link_down_info);
643 break;
644 }
645 }
646
647 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
648 {
649 struct zfcp_fsf_req *req;
650
651 if (likely(pool))
652 req = mempool_alloc(pool, GFP_ATOMIC);
653 else
654 req = kmalloc(sizeof(*req), GFP_ATOMIC);
655
656 if (unlikely(!req))
657 return NULL;
658
659 memset(req, 0, sizeof(*req));
660 req->pool = pool;
661 return req;
662 }
663
664 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
665 {
666 struct fsf_qtcb *qtcb;
667
668 if (likely(pool))
669 qtcb = mempool_alloc(pool, GFP_ATOMIC);
670 else
671 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
672
673 if (unlikely(!qtcb))
674 return NULL;
675
676 memset(qtcb, 0, sizeof(*qtcb));
677 return qtcb;
678 }
679
680 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
681 u32 fsf_cmd, u8 sbtype,
682 mempool_t *pool)
683 {
684 struct zfcp_adapter *adapter = qdio->adapter;
685 struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
686
687 if (unlikely(!req))
688 return ERR_PTR(-ENOMEM);
689
690 if (adapter->req_no == 0)
691 adapter->req_no++;
692
693 INIT_LIST_HEAD(&req->list);
694 init_timer(&req->timer);
695 init_completion(&req->completion);
696
697 req->adapter = adapter;
698 req->fsf_command = fsf_cmd;
699 req->req_id = adapter->req_no;
700
701 if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
702 if (likely(pool))
703 req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
704 else
705 req->qtcb = zfcp_qtcb_alloc(NULL);
706
707 if (unlikely(!req->qtcb)) {
708 zfcp_fsf_req_free(req);
709 return ERR_PTR(-ENOMEM);
710 }
711
712 req->seq_no = adapter->fsf_req_seq_no;
713 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
714 req->qtcb->prefix.req_id = req->req_id;
715 req->qtcb->prefix.ulp_info = 26;
716 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
717 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
718 req->qtcb->header.req_handle = req->req_id;
719 req->qtcb->header.fsf_command = req->fsf_command;
720 }
721
722 zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
723 req->qtcb, sizeof(struct fsf_qtcb));
724
725 return req;
726 }
727
728 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
729 {
730 struct zfcp_adapter *adapter = req->adapter;
731 struct zfcp_qdio *qdio = adapter->qdio;
732 int with_qtcb = (req->qtcb != NULL);
733 int req_id = req->req_id;
734
735 zfcp_reqlist_add(adapter->req_list, req);
736
737 req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
738 req->issued = get_tod_clock();
739 if (zfcp_qdio_send(qdio, &req->qdio_req)) {
740 del_timer(&req->timer);
741 /* lookup request again, list might have changed */
742 zfcp_reqlist_find_rm(adapter->req_list, req_id);
743 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
744 return -EIO;
745 }
746
747 /* Don't increase for unsolicited status */
748 if (with_qtcb)
749 adapter->fsf_req_seq_no++;
750 adapter->req_no++;
751
752 return 0;
753 }
754
755 /**
756 * zfcp_fsf_status_read - send status read request
757 * @adapter: pointer to struct zfcp_adapter
758 * @req_flags: request flags
759 * Returns: 0 on success, ERROR otherwise
760 */
761 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
762 {
763 struct zfcp_adapter *adapter = qdio->adapter;
764 struct zfcp_fsf_req *req;
765 struct fsf_status_read_buffer *sr_buf;
766 struct page *page;
767 int retval = -EIO;
768
769 spin_lock_irq(&qdio->req_q_lock);
770 if (zfcp_qdio_sbal_get(qdio))
771 goto out;
772
773 req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
774 SBAL_SFLAGS0_TYPE_STATUS,
775 adapter->pool.status_read_req);
776 if (IS_ERR(req)) {
777 retval = PTR_ERR(req);
778 goto out;
779 }
780
781 page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
782 if (!page) {
783 retval = -ENOMEM;
784 goto failed_buf;
785 }
786 sr_buf = page_address(page);
787 memset(sr_buf, 0, sizeof(*sr_buf));
788 req->data = sr_buf;
789
790 zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
791 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
792
793 retval = zfcp_fsf_req_send(req);
794 if (retval)
795 goto failed_req_send;
796
797 goto out;
798
799 failed_req_send:
800 req->data = NULL;
801 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
802 failed_buf:
803 zfcp_dbf_hba_fsf_uss("fssr__1", req);
804 zfcp_fsf_req_free(req);
805 out:
806 spin_unlock_irq(&qdio->req_q_lock);
807 return retval;
808 }
809
810 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
811 {
812 struct scsi_device *sdev = req->data;
813 struct zfcp_scsi_dev *zfcp_sdev;
814 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
815
816 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
817 return;
818
819 zfcp_sdev = sdev_to_zfcp(sdev);
820
821 switch (req->qtcb->header.fsf_status) {
822 case FSF_PORT_HANDLE_NOT_VALID:
823 if (fsq->word[0] == fsq->word[1]) {
824 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
825 "fsafch1");
826 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
827 }
828 break;
829 case FSF_LUN_HANDLE_NOT_VALID:
830 if (fsq->word[0] == fsq->word[1]) {
831 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
832 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
833 }
834 break;
835 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
836 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
837 break;
838 case FSF_PORT_BOXED:
839 zfcp_erp_set_port_status(zfcp_sdev->port,
840 ZFCP_STATUS_COMMON_ACCESS_BOXED);
841 zfcp_erp_port_reopen(zfcp_sdev->port,
842 ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
843 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
844 break;
845 case FSF_LUN_BOXED:
846 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
847 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
848 "fsafch4");
849 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
850 break;
851 case FSF_ADAPTER_STATUS_AVAILABLE:
852 switch (fsq->word[0]) {
853 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
854 zfcp_fc_test_link(zfcp_sdev->port);
855 /* fall through */
856 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
857 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
858 break;
859 }
860 break;
861 case FSF_GOOD:
862 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
863 break;
864 }
865 }
866
867 /**
868 * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
869 * @scmnd: The SCSI command to abort
870 * Returns: pointer to struct zfcp_fsf_req
871 */
872
873 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
874 {
875 struct zfcp_fsf_req *req = NULL;
876 struct scsi_device *sdev = scmnd->device;
877 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
878 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
879 unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
880
881 spin_lock_irq(&qdio->req_q_lock);
882 if (zfcp_qdio_sbal_get(qdio))
883 goto out;
884 req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
885 SBAL_SFLAGS0_TYPE_READ,
886 qdio->adapter->pool.scsi_abort);
887 if (IS_ERR(req)) {
888 req = NULL;
889 goto out;
890 }
891
892 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
893 ZFCP_STATUS_COMMON_UNBLOCKED)))
894 goto out_error_free;
895
896 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
897
898 req->data = sdev;
899 req->handler = zfcp_fsf_abort_fcp_command_handler;
900 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
901 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
902 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
903
904 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
905 if (!zfcp_fsf_req_send(req))
906 goto out;
907
908 out_error_free:
909 zfcp_fsf_req_free(req);
910 req = NULL;
911 out:
912 spin_unlock_irq(&qdio->req_q_lock);
913 return req;
914 }
915
916 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
917 {
918 struct zfcp_adapter *adapter = req->adapter;
919 struct zfcp_fsf_ct_els *ct = req->data;
920 struct fsf_qtcb_header *header = &req->qtcb->header;
921
922 ct->status = -EINVAL;
923
924 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
925 goto skip_fsfstatus;
926
927 switch (header->fsf_status) {
928 case FSF_GOOD:
929 zfcp_dbf_san_res("fsscth2", req);
930 ct->status = 0;
931 break;
932 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
933 zfcp_fsf_class_not_supp(req);
934 break;
935 case FSF_ADAPTER_STATUS_AVAILABLE:
936 switch (header->fsf_status_qual.word[0]){
937 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
938 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
939 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
940 break;
941 }
942 break;
943 case FSF_PORT_BOXED:
944 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
945 break;
946 case FSF_PORT_HANDLE_NOT_VALID:
947 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
948 /* fall through */
949 case FSF_GENERIC_COMMAND_REJECTED:
950 case FSF_PAYLOAD_SIZE_MISMATCH:
951 case FSF_REQUEST_SIZE_TOO_LARGE:
952 case FSF_RESPONSE_SIZE_TOO_LARGE:
953 case FSF_SBAL_MISMATCH:
954 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
955 break;
956 }
957
958 skip_fsfstatus:
959 if (ct->handler)
960 ct->handler(ct->handler_data);
961 }
962
963 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
964 struct zfcp_qdio_req *q_req,
965 struct scatterlist *sg_req,
966 struct scatterlist *sg_resp)
967 {
968 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
969 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
970 zfcp_qdio_set_sbale_last(qdio, q_req);
971 }
972
973 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
974 struct scatterlist *sg_req,
975 struct scatterlist *sg_resp)
976 {
977 struct zfcp_adapter *adapter = req->adapter;
978 struct zfcp_qdio *qdio = adapter->qdio;
979 struct fsf_qtcb *qtcb = req->qtcb;
980 u32 feat = adapter->adapter_features;
981
982 if (zfcp_adapter_multi_buffer_active(adapter)) {
983 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
984 return -EIO;
985 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
986 return -EIO;
987
988 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
989 zfcp_qdio_sbale_count(sg_req));
990 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
991 zfcp_qdio_set_scount(qdio, &req->qdio_req);
992 return 0;
993 }
994
995 /* use single, unchained SBAL if it can hold the request */
996 if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
997 zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req,
998 sg_req, sg_resp);
999 return 0;
1000 }
1001
1002 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS))
1003 return -EOPNOTSUPP;
1004
1005 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
1006 return -EIO;
1007
1008 qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req);
1009
1010 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1011 zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req);
1012
1013 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
1014 return -EIO;
1015
1016 qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp);
1017
1018 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1019
1020 return 0;
1021 }
1022
1023 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1024 struct scatterlist *sg_req,
1025 struct scatterlist *sg_resp,
1026 unsigned int timeout)
1027 {
1028 int ret;
1029
1030 ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
1031 if (ret)
1032 return ret;
1033
1034 /* common settings for ct/gs and els requests */
1035 if (timeout > 255)
1036 timeout = 255; /* max value accepted by hardware */
1037 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1038 req->qtcb->bottom.support.timeout = timeout;
1039 zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1040
1041 return 0;
1042 }
1043
1044 /**
1045 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1046 * @ct: pointer to struct zfcp_send_ct with data for request
1047 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1048 */
1049 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1050 struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1051 unsigned int timeout)
1052 {
1053 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1054 struct zfcp_fsf_req *req;
1055 int ret = -EIO;
1056
1057 spin_lock_irq(&qdio->req_q_lock);
1058 if (zfcp_qdio_sbal_get(qdio))
1059 goto out;
1060
1061 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1062 SBAL_SFLAGS0_TYPE_WRITE_READ, pool);
1063
1064 if (IS_ERR(req)) {
1065 ret = PTR_ERR(req);
1066 goto out;
1067 }
1068
1069 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1070 ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1071 if (ret)
1072 goto failed_send;
1073
1074 req->handler = zfcp_fsf_send_ct_handler;
1075 req->qtcb->header.port_handle = wka_port->handle;
1076 req->data = ct;
1077
1078 zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1079
1080 ret = zfcp_fsf_req_send(req);
1081 if (ret)
1082 goto failed_send;
1083
1084 goto out;
1085
1086 failed_send:
1087 zfcp_fsf_req_free(req);
1088 out:
1089 spin_unlock_irq(&qdio->req_q_lock);
1090 return ret;
1091 }
1092
1093 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1094 {
1095 struct zfcp_fsf_ct_els *send_els = req->data;
1096 struct fsf_qtcb_header *header = &req->qtcb->header;
1097
1098 send_els->status = -EINVAL;
1099
1100 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1101 goto skip_fsfstatus;
1102
1103 switch (header->fsf_status) {
1104 case FSF_GOOD:
1105 zfcp_dbf_san_res("fsselh1", req);
1106 send_els->status = 0;
1107 break;
1108 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1109 zfcp_fsf_class_not_supp(req);
1110 break;
1111 case FSF_ADAPTER_STATUS_AVAILABLE:
1112 switch (header->fsf_status_qual.word[0]){
1113 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1114 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1115 case FSF_SQ_RETRY_IF_POSSIBLE:
1116 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1117 break;
1118 }
1119 break;
1120 case FSF_ELS_COMMAND_REJECTED:
1121 case FSF_PAYLOAD_SIZE_MISMATCH:
1122 case FSF_REQUEST_SIZE_TOO_LARGE:
1123 case FSF_RESPONSE_SIZE_TOO_LARGE:
1124 break;
1125 case FSF_SBAL_MISMATCH:
1126 /* should never occur, avoided in zfcp_fsf_send_els */
1127 /* fall through */
1128 default:
1129 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1130 break;
1131 }
1132 skip_fsfstatus:
1133 if (send_els->handler)
1134 send_els->handler(send_els->handler_data);
1135 }
1136
1137 /**
1138 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1139 * @els: pointer to struct zfcp_send_els with data for the command
1140 */
1141 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1142 struct zfcp_fsf_ct_els *els, unsigned int timeout)
1143 {
1144 struct zfcp_fsf_req *req;
1145 struct zfcp_qdio *qdio = adapter->qdio;
1146 int ret = -EIO;
1147
1148 spin_lock_irq(&qdio->req_q_lock);
1149 if (zfcp_qdio_sbal_get(qdio))
1150 goto out;
1151
1152 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1153 SBAL_SFLAGS0_TYPE_WRITE_READ, NULL);
1154
1155 if (IS_ERR(req)) {
1156 ret = PTR_ERR(req);
1157 goto out;
1158 }
1159
1160 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1161
1162 if (!zfcp_adapter_multi_buffer_active(adapter))
1163 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1164
1165 ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1166
1167 if (ret)
1168 goto failed_send;
1169
1170 hton24(req->qtcb->bottom.support.d_id, d_id);
1171 req->handler = zfcp_fsf_send_els_handler;
1172 req->data = els;
1173
1174 zfcp_dbf_san_req("fssels1", req, d_id);
1175
1176 ret = zfcp_fsf_req_send(req);
1177 if (ret)
1178 goto failed_send;
1179
1180 goto out;
1181
1182 failed_send:
1183 zfcp_fsf_req_free(req);
1184 out:
1185 spin_unlock_irq(&qdio->req_q_lock);
1186 return ret;
1187 }
1188
1189 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1190 {
1191 struct zfcp_fsf_req *req;
1192 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1193 int retval = -EIO;
1194
1195 spin_lock_irq(&qdio->req_q_lock);
1196 if (zfcp_qdio_sbal_get(qdio))
1197 goto out;
1198
1199 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1200 SBAL_SFLAGS0_TYPE_READ,
1201 qdio->adapter->pool.erp_req);
1202
1203 if (IS_ERR(req)) {
1204 retval = PTR_ERR(req);
1205 goto out;
1206 }
1207
1208 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1209 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1210
1211 req->qtcb->bottom.config.feature_selection =
1212 FSF_FEATURE_NOTIFICATION_LOST |
1213 FSF_FEATURE_UPDATE_ALERT;
1214 req->erp_action = erp_action;
1215 req->handler = zfcp_fsf_exchange_config_data_handler;
1216 erp_action->fsf_req_id = req->req_id;
1217
1218 zfcp_fsf_start_erp_timer(req);
1219 retval = zfcp_fsf_req_send(req);
1220 if (retval) {
1221 zfcp_fsf_req_free(req);
1222 erp_action->fsf_req_id = 0;
1223 }
1224 out:
1225 spin_unlock_irq(&qdio->req_q_lock);
1226 return retval;
1227 }
1228
1229 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1230 struct fsf_qtcb_bottom_config *data)
1231 {
1232 struct zfcp_fsf_req *req = NULL;
1233 int retval = -EIO;
1234
1235 spin_lock_irq(&qdio->req_q_lock);
1236 if (zfcp_qdio_sbal_get(qdio))
1237 goto out_unlock;
1238
1239 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1240 SBAL_SFLAGS0_TYPE_READ, NULL);
1241
1242 if (IS_ERR(req)) {
1243 retval = PTR_ERR(req);
1244 goto out_unlock;
1245 }
1246
1247 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1248 req->handler = zfcp_fsf_exchange_config_data_handler;
1249
1250 req->qtcb->bottom.config.feature_selection =
1251 FSF_FEATURE_NOTIFICATION_LOST |
1252 FSF_FEATURE_UPDATE_ALERT;
1253
1254 if (data)
1255 req->data = data;
1256
1257 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1258 retval = zfcp_fsf_req_send(req);
1259 spin_unlock_irq(&qdio->req_q_lock);
1260 if (!retval)
1261 wait_for_completion(&req->completion);
1262
1263 zfcp_fsf_req_free(req);
1264 return retval;
1265
1266 out_unlock:
1267 spin_unlock_irq(&qdio->req_q_lock);
1268 return retval;
1269 }
1270
1271 /**
1272 * zfcp_fsf_exchange_port_data - request information about local port
1273 * @erp_action: ERP action for the adapter for which port data is requested
1274 * Returns: 0 on success, error otherwise
1275 */
1276 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1277 {
1278 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1279 struct zfcp_fsf_req *req;
1280 int retval = -EIO;
1281
1282 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1283 return -EOPNOTSUPP;
1284
1285 spin_lock_irq(&qdio->req_q_lock);
1286 if (zfcp_qdio_sbal_get(qdio))
1287 goto out;
1288
1289 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1290 SBAL_SFLAGS0_TYPE_READ,
1291 qdio->adapter->pool.erp_req);
1292
1293 if (IS_ERR(req)) {
1294 retval = PTR_ERR(req);
1295 goto out;
1296 }
1297
1298 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1299 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1300
1301 req->handler = zfcp_fsf_exchange_port_data_handler;
1302 req->erp_action = erp_action;
1303 erp_action->fsf_req_id = req->req_id;
1304
1305 zfcp_fsf_start_erp_timer(req);
1306 retval = zfcp_fsf_req_send(req);
1307 if (retval) {
1308 zfcp_fsf_req_free(req);
1309 erp_action->fsf_req_id = 0;
1310 }
1311 out:
1312 spin_unlock_irq(&qdio->req_q_lock);
1313 return retval;
1314 }
1315
1316 /**
1317 * zfcp_fsf_exchange_port_data_sync - request information about local port
1318 * @qdio: pointer to struct zfcp_qdio
1319 * @data: pointer to struct fsf_qtcb_bottom_port
1320 * Returns: 0 on success, error otherwise
1321 */
1322 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1323 struct fsf_qtcb_bottom_port *data)
1324 {
1325 struct zfcp_fsf_req *req = NULL;
1326 int retval = -EIO;
1327
1328 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1329 return -EOPNOTSUPP;
1330
1331 spin_lock_irq(&qdio->req_q_lock);
1332 if (zfcp_qdio_sbal_get(qdio))
1333 goto out_unlock;
1334
1335 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1336 SBAL_SFLAGS0_TYPE_READ, NULL);
1337
1338 if (IS_ERR(req)) {
1339 retval = PTR_ERR(req);
1340 goto out_unlock;
1341 }
1342
1343 if (data)
1344 req->data = data;
1345
1346 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1347
1348 req->handler = zfcp_fsf_exchange_port_data_handler;
1349 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1350 retval = zfcp_fsf_req_send(req);
1351 spin_unlock_irq(&qdio->req_q_lock);
1352
1353 if (!retval)
1354 wait_for_completion(&req->completion);
1355
1356 zfcp_fsf_req_free(req);
1357
1358 return retval;
1359
1360 out_unlock:
1361 spin_unlock_irq(&qdio->req_q_lock);
1362 return retval;
1363 }
1364
1365 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1366 {
1367 struct zfcp_port *port = req->data;
1368 struct fsf_qtcb_header *header = &req->qtcb->header;
1369 struct fc_els_flogi *plogi;
1370
1371 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1372 goto out;
1373
1374 switch (header->fsf_status) {
1375 case FSF_PORT_ALREADY_OPEN:
1376 break;
1377 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1378 dev_warn(&req->adapter->ccw_device->dev,
1379 "Not enough FCP adapter resources to open "
1380 "remote port 0x%016Lx\n",
1381 (unsigned long long)port->wwpn);
1382 zfcp_erp_set_port_status(port,
1383 ZFCP_STATUS_COMMON_ERP_FAILED);
1384 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1385 break;
1386 case FSF_ADAPTER_STATUS_AVAILABLE:
1387 switch (header->fsf_status_qual.word[0]) {
1388 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1389 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1390 case FSF_SQ_NO_RETRY_POSSIBLE:
1391 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1392 break;
1393 }
1394 break;
1395 case FSF_GOOD:
1396 port->handle = header->port_handle;
1397 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1398 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1399 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1400 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1401 &port->status);
1402 /* check whether D_ID has changed during open */
1403 /*
1404 * FIXME: This check is not airtight, as the FCP channel does
1405 * not monitor closures of target port connections caused on
1406 * the remote side. Thus, they might miss out on invalidating
1407 * locally cached WWPNs (and other N_Port parameters) of gone
1408 * target ports. So, our heroic attempt to make things safe
1409 * could be undermined by 'open port' response data tagged with
1410 * obsolete WWPNs. Another reason to monitor potential
1411 * connection closures ourself at least (by interpreting
1412 * incoming ELS' and unsolicited status). It just crosses my
1413 * mind that one should be able to cross-check by means of
1414 * another GID_PN straight after a port has been opened.
1415 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1416 */
1417 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1418 if (req->qtcb->bottom.support.els1_length >=
1419 FSF_PLOGI_MIN_LEN)
1420 zfcp_fc_plogi_evaluate(port, plogi);
1421 break;
1422 case FSF_UNKNOWN_OP_SUBTYPE:
1423 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1424 break;
1425 }
1426
1427 out:
1428 put_device(&port->dev);
1429 }
1430
1431 /**
1432 * zfcp_fsf_open_port - create and send open port request
1433 * @erp_action: pointer to struct zfcp_erp_action
1434 * Returns: 0 on success, error otherwise
1435 */
1436 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1437 {
1438 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1439 struct zfcp_port *port = erp_action->port;
1440 struct zfcp_fsf_req *req;
1441 int retval = -EIO;
1442
1443 spin_lock_irq(&qdio->req_q_lock);
1444 if (zfcp_qdio_sbal_get(qdio))
1445 goto out;
1446
1447 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1448 SBAL_SFLAGS0_TYPE_READ,
1449 qdio->adapter->pool.erp_req);
1450
1451 if (IS_ERR(req)) {
1452 retval = PTR_ERR(req);
1453 goto out;
1454 }
1455
1456 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1457 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1458
1459 req->handler = zfcp_fsf_open_port_handler;
1460 hton24(req->qtcb->bottom.support.d_id, port->d_id);
1461 req->data = port;
1462 req->erp_action = erp_action;
1463 erp_action->fsf_req_id = req->req_id;
1464 get_device(&port->dev);
1465
1466 zfcp_fsf_start_erp_timer(req);
1467 retval = zfcp_fsf_req_send(req);
1468 if (retval) {
1469 zfcp_fsf_req_free(req);
1470 erp_action->fsf_req_id = 0;
1471 put_device(&port->dev);
1472 }
1473 out:
1474 spin_unlock_irq(&qdio->req_q_lock);
1475 return retval;
1476 }
1477
1478 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1479 {
1480 struct zfcp_port *port = req->data;
1481
1482 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1483 return;
1484
1485 switch (req->qtcb->header.fsf_status) {
1486 case FSF_PORT_HANDLE_NOT_VALID:
1487 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1488 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1489 break;
1490 case FSF_ADAPTER_STATUS_AVAILABLE:
1491 break;
1492 case FSF_GOOD:
1493 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1494 break;
1495 }
1496 }
1497
1498 /**
1499 * zfcp_fsf_close_port - create and send close port request
1500 * @erp_action: pointer to struct zfcp_erp_action
1501 * Returns: 0 on success, error otherwise
1502 */
1503 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1504 {
1505 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1506 struct zfcp_fsf_req *req;
1507 int retval = -EIO;
1508
1509 spin_lock_irq(&qdio->req_q_lock);
1510 if (zfcp_qdio_sbal_get(qdio))
1511 goto out;
1512
1513 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1514 SBAL_SFLAGS0_TYPE_READ,
1515 qdio->adapter->pool.erp_req);
1516
1517 if (IS_ERR(req)) {
1518 retval = PTR_ERR(req);
1519 goto out;
1520 }
1521
1522 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1523 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1524
1525 req->handler = zfcp_fsf_close_port_handler;
1526 req->data = erp_action->port;
1527 req->erp_action = erp_action;
1528 req->qtcb->header.port_handle = erp_action->port->handle;
1529 erp_action->fsf_req_id = req->req_id;
1530
1531 zfcp_fsf_start_erp_timer(req);
1532 retval = zfcp_fsf_req_send(req);
1533 if (retval) {
1534 zfcp_fsf_req_free(req);
1535 erp_action->fsf_req_id = 0;
1536 }
1537 out:
1538 spin_unlock_irq(&qdio->req_q_lock);
1539 return retval;
1540 }
1541
1542 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1543 {
1544 struct zfcp_fc_wka_port *wka_port = req->data;
1545 struct fsf_qtcb_header *header = &req->qtcb->header;
1546
1547 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1548 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1549 goto out;
1550 }
1551
1552 switch (header->fsf_status) {
1553 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1554 dev_warn(&req->adapter->ccw_device->dev,
1555 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1556 /* fall through */
1557 case FSF_ADAPTER_STATUS_AVAILABLE:
1558 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1559 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1560 break;
1561 case FSF_GOOD:
1562 wka_port->handle = header->port_handle;
1563 /* fall through */
1564 case FSF_PORT_ALREADY_OPEN:
1565 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1566 }
1567 out:
1568 wake_up(&wka_port->completion_wq);
1569 }
1570
1571 /**
1572 * zfcp_fsf_open_wka_port - create and send open wka-port request
1573 * @wka_port: pointer to struct zfcp_fc_wka_port
1574 * Returns: 0 on success, error otherwise
1575 */
1576 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1577 {
1578 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1579 struct zfcp_fsf_req *req;
1580 int retval = -EIO;
1581
1582 spin_lock_irq(&qdio->req_q_lock);
1583 if (zfcp_qdio_sbal_get(qdio))
1584 goto out;
1585
1586 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1587 SBAL_SFLAGS0_TYPE_READ,
1588 qdio->adapter->pool.erp_req);
1589
1590 if (IS_ERR(req)) {
1591 retval = PTR_ERR(req);
1592 goto out;
1593 }
1594
1595 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1596 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1597
1598 req->handler = zfcp_fsf_open_wka_port_handler;
1599 hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1600 req->data = wka_port;
1601
1602 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1603 retval = zfcp_fsf_req_send(req);
1604 if (retval)
1605 zfcp_fsf_req_free(req);
1606 out:
1607 spin_unlock_irq(&qdio->req_q_lock);
1608 return retval;
1609 }
1610
1611 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1612 {
1613 struct zfcp_fc_wka_port *wka_port = req->data;
1614
1615 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1616 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1617 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1618 }
1619
1620 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1621 wake_up(&wka_port->completion_wq);
1622 }
1623
1624 /**
1625 * zfcp_fsf_close_wka_port - create and send close wka port request
1626 * @wka_port: WKA port to open
1627 * Returns: 0 on success, error otherwise
1628 */
1629 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1630 {
1631 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1632 struct zfcp_fsf_req *req;
1633 int retval = -EIO;
1634
1635 spin_lock_irq(&qdio->req_q_lock);
1636 if (zfcp_qdio_sbal_get(qdio))
1637 goto out;
1638
1639 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1640 SBAL_SFLAGS0_TYPE_READ,
1641 qdio->adapter->pool.erp_req);
1642
1643 if (IS_ERR(req)) {
1644 retval = PTR_ERR(req);
1645 goto out;
1646 }
1647
1648 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1649 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1650
1651 req->handler = zfcp_fsf_close_wka_port_handler;
1652 req->data = wka_port;
1653 req->qtcb->header.port_handle = wka_port->handle;
1654
1655 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1656 retval = zfcp_fsf_req_send(req);
1657 if (retval)
1658 zfcp_fsf_req_free(req);
1659 out:
1660 spin_unlock_irq(&qdio->req_q_lock);
1661 return retval;
1662 }
1663
1664 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1665 {
1666 struct zfcp_port *port = req->data;
1667 struct fsf_qtcb_header *header = &req->qtcb->header;
1668 struct scsi_device *sdev;
1669
1670 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1671 return;
1672
1673 switch (header->fsf_status) {
1674 case FSF_PORT_HANDLE_NOT_VALID:
1675 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
1676 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1677 break;
1678 case FSF_PORT_BOXED:
1679 /* can't use generic zfcp_erp_modify_port_status because
1680 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1681 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1682 shost_for_each_device(sdev, port->adapter->scsi_host)
1683 if (sdev_to_zfcp(sdev)->port == port)
1684 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1685 &sdev_to_zfcp(sdev)->status);
1686 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1687 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1688 "fscpph2");
1689 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1690 break;
1691 case FSF_ADAPTER_STATUS_AVAILABLE:
1692 switch (header->fsf_status_qual.word[0]) {
1693 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1694 /* fall through */
1695 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1696 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1697 break;
1698 }
1699 break;
1700 case FSF_GOOD:
1701 /* can't use generic zfcp_erp_modify_port_status because
1702 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1703 */
1704 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1705 shost_for_each_device(sdev, port->adapter->scsi_host)
1706 if (sdev_to_zfcp(sdev)->port == port)
1707 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1708 &sdev_to_zfcp(sdev)->status);
1709 break;
1710 }
1711 }
1712
1713 /**
1714 * zfcp_fsf_close_physical_port - close physical port
1715 * @erp_action: pointer to struct zfcp_erp_action
1716 * Returns: 0 on success
1717 */
1718 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1719 {
1720 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1721 struct zfcp_fsf_req *req;
1722 int retval = -EIO;
1723
1724 spin_lock_irq(&qdio->req_q_lock);
1725 if (zfcp_qdio_sbal_get(qdio))
1726 goto out;
1727
1728 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1729 SBAL_SFLAGS0_TYPE_READ,
1730 qdio->adapter->pool.erp_req);
1731
1732 if (IS_ERR(req)) {
1733 retval = PTR_ERR(req);
1734 goto out;
1735 }
1736
1737 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1738 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1739
1740 req->data = erp_action->port;
1741 req->qtcb->header.port_handle = erp_action->port->handle;
1742 req->erp_action = erp_action;
1743 req->handler = zfcp_fsf_close_physical_port_handler;
1744 erp_action->fsf_req_id = req->req_id;
1745
1746 zfcp_fsf_start_erp_timer(req);
1747 retval = zfcp_fsf_req_send(req);
1748 if (retval) {
1749 zfcp_fsf_req_free(req);
1750 erp_action->fsf_req_id = 0;
1751 }
1752 out:
1753 spin_unlock_irq(&qdio->req_q_lock);
1754 return retval;
1755 }
1756
1757 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1758 {
1759 struct zfcp_adapter *adapter = req->adapter;
1760 struct scsi_device *sdev = req->data;
1761 struct zfcp_scsi_dev *zfcp_sdev;
1762 struct fsf_qtcb_header *header = &req->qtcb->header;
1763 union fsf_status_qual *qual = &header->fsf_status_qual;
1764
1765 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1766 return;
1767
1768 zfcp_sdev = sdev_to_zfcp(sdev);
1769
1770 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1771 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1772 &zfcp_sdev->status);
1773
1774 switch (header->fsf_status) {
1775
1776 case FSF_PORT_HANDLE_NOT_VALID:
1777 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
1778 /* fall through */
1779 case FSF_LUN_ALREADY_OPEN:
1780 break;
1781 case FSF_PORT_BOXED:
1782 zfcp_erp_set_port_status(zfcp_sdev->port,
1783 ZFCP_STATUS_COMMON_ACCESS_BOXED);
1784 zfcp_erp_port_reopen(zfcp_sdev->port,
1785 ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
1786 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1787 break;
1788 case FSF_LUN_SHARING_VIOLATION:
1789 if (qual->word[0])
1790 dev_warn(&zfcp_sdev->port->adapter->ccw_device->dev,
1791 "LUN 0x%Lx on port 0x%Lx is already in "
1792 "use by CSS%d, MIF Image ID %x\n",
1793 zfcp_scsi_dev_lun(sdev),
1794 (unsigned long long)zfcp_sdev->port->wwpn,
1795 qual->fsf_queue_designator.cssid,
1796 qual->fsf_queue_designator.hla);
1797 zfcp_erp_set_lun_status(sdev,
1798 ZFCP_STATUS_COMMON_ERP_FAILED |
1799 ZFCP_STATUS_COMMON_ACCESS_DENIED);
1800 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1801 break;
1802 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1803 dev_warn(&adapter->ccw_device->dev,
1804 "No handle is available for LUN "
1805 "0x%016Lx on port 0x%016Lx\n",
1806 (unsigned long long)zfcp_scsi_dev_lun(sdev),
1807 (unsigned long long)zfcp_sdev->port->wwpn);
1808 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1809 /* fall through */
1810 case FSF_INVALID_COMMAND_OPTION:
1811 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1812 break;
1813 case FSF_ADAPTER_STATUS_AVAILABLE:
1814 switch (header->fsf_status_qual.word[0]) {
1815 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1816 zfcp_fc_test_link(zfcp_sdev->port);
1817 /* fall through */
1818 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1819 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1820 break;
1821 }
1822 break;
1823
1824 case FSF_GOOD:
1825 zfcp_sdev->lun_handle = header->lun_handle;
1826 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1827 break;
1828 }
1829 }
1830
1831 /**
1832 * zfcp_fsf_open_lun - open LUN
1833 * @erp_action: pointer to struct zfcp_erp_action
1834 * Returns: 0 on success, error otherwise
1835 */
1836 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1837 {
1838 struct zfcp_adapter *adapter = erp_action->adapter;
1839 struct zfcp_qdio *qdio = adapter->qdio;
1840 struct zfcp_fsf_req *req;
1841 int retval = -EIO;
1842
1843 spin_lock_irq(&qdio->req_q_lock);
1844 if (zfcp_qdio_sbal_get(qdio))
1845 goto out;
1846
1847 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1848 SBAL_SFLAGS0_TYPE_READ,
1849 adapter->pool.erp_req);
1850
1851 if (IS_ERR(req)) {
1852 retval = PTR_ERR(req);
1853 goto out;
1854 }
1855
1856 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1857 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1858
1859 req->qtcb->header.port_handle = erp_action->port->handle;
1860 req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1861 req->handler = zfcp_fsf_open_lun_handler;
1862 req->data = erp_action->sdev;
1863 req->erp_action = erp_action;
1864 erp_action->fsf_req_id = req->req_id;
1865
1866 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1867 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1868
1869 zfcp_fsf_start_erp_timer(req);
1870 retval = zfcp_fsf_req_send(req);
1871 if (retval) {
1872 zfcp_fsf_req_free(req);
1873 erp_action->fsf_req_id = 0;
1874 }
1875 out:
1876 spin_unlock_irq(&qdio->req_q_lock);
1877 return retval;
1878 }
1879
1880 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1881 {
1882 struct scsi_device *sdev = req->data;
1883 struct zfcp_scsi_dev *zfcp_sdev;
1884
1885 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1886 return;
1887
1888 zfcp_sdev = sdev_to_zfcp(sdev);
1889
1890 switch (req->qtcb->header.fsf_status) {
1891 case FSF_PORT_HANDLE_NOT_VALID:
1892 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
1893 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1894 break;
1895 case FSF_LUN_HANDLE_NOT_VALID:
1896 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
1897 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1898 break;
1899 case FSF_PORT_BOXED:
1900 zfcp_erp_set_port_status(zfcp_sdev->port,
1901 ZFCP_STATUS_COMMON_ACCESS_BOXED);
1902 zfcp_erp_port_reopen(zfcp_sdev->port,
1903 ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
1904 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1905 break;
1906 case FSF_ADAPTER_STATUS_AVAILABLE:
1907 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1908 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1909 zfcp_fc_test_link(zfcp_sdev->port);
1910 /* fall through */
1911 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1912 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1913 break;
1914 }
1915 break;
1916 case FSF_GOOD:
1917 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1918 break;
1919 }
1920 }
1921
1922 /**
1923 * zfcp_fsf_close_LUN - close LUN
1924 * @erp_action: pointer to erp_action triggering the "close LUN"
1925 * Returns: 0 on success, error otherwise
1926 */
1927 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
1928 {
1929 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1930 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1931 struct zfcp_fsf_req *req;
1932 int retval = -EIO;
1933
1934 spin_lock_irq(&qdio->req_q_lock);
1935 if (zfcp_qdio_sbal_get(qdio))
1936 goto out;
1937
1938 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1939 SBAL_SFLAGS0_TYPE_READ,
1940 qdio->adapter->pool.erp_req);
1941
1942 if (IS_ERR(req)) {
1943 retval = PTR_ERR(req);
1944 goto out;
1945 }
1946
1947 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1948 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1949
1950 req->qtcb->header.port_handle = erp_action->port->handle;
1951 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1952 req->handler = zfcp_fsf_close_lun_handler;
1953 req->data = erp_action->sdev;
1954 req->erp_action = erp_action;
1955 erp_action->fsf_req_id = req->req_id;
1956
1957 zfcp_fsf_start_erp_timer(req);
1958 retval = zfcp_fsf_req_send(req);
1959 if (retval) {
1960 zfcp_fsf_req_free(req);
1961 erp_action->fsf_req_id = 0;
1962 }
1963 out:
1964 spin_unlock_irq(&qdio->req_q_lock);
1965 return retval;
1966 }
1967
1968 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
1969 {
1970 lat_rec->sum += lat;
1971 lat_rec->min = min(lat_rec->min, lat);
1972 lat_rec->max = max(lat_rec->max, lat);
1973 }
1974
1975 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
1976 {
1977 struct fsf_qual_latency_info *lat_in;
1978 struct latency_cont *lat = NULL;
1979 struct zfcp_scsi_dev *zfcp_sdev;
1980 struct zfcp_blk_drv_data blktrc;
1981 int ticks = req->adapter->timer_ticks;
1982
1983 lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
1984
1985 blktrc.flags = 0;
1986 blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
1987 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1988 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
1989 blktrc.inb_usage = 0;
1990 blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
1991
1992 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
1993 !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
1994 zfcp_sdev = sdev_to_zfcp(scsi->device);
1995 blktrc.flags |= ZFCP_BLK_LAT_VALID;
1996 blktrc.channel_lat = lat_in->channel_lat * ticks;
1997 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
1998
1999 switch (req->qtcb->bottom.io.data_direction) {
2000 case FSF_DATADIR_DIF_READ_STRIP:
2001 case FSF_DATADIR_DIF_READ_CONVERT:
2002 case FSF_DATADIR_READ:
2003 lat = &zfcp_sdev->latencies.read;
2004 break;
2005 case FSF_DATADIR_DIF_WRITE_INSERT:
2006 case FSF_DATADIR_DIF_WRITE_CONVERT:
2007 case FSF_DATADIR_WRITE:
2008 lat = &zfcp_sdev->latencies.write;
2009 break;
2010 case FSF_DATADIR_CMND:
2011 lat = &zfcp_sdev->latencies.cmd;
2012 break;
2013 }
2014
2015 if (lat) {
2016 spin_lock(&zfcp_sdev->latencies.lock);
2017 zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2018 zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2019 lat->counter++;
2020 spin_unlock(&zfcp_sdev->latencies.lock);
2021 }
2022 }
2023
2024 blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2025 sizeof(blktrc));
2026 }
2027
2028 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
2029 {
2030 struct scsi_cmnd *scmnd = req->data;
2031 struct scsi_device *sdev = scmnd->device;
2032 struct zfcp_scsi_dev *zfcp_sdev;
2033 struct fsf_qtcb_header *header = &req->qtcb->header;
2034
2035 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2036 return;
2037
2038 zfcp_sdev = sdev_to_zfcp(sdev);
2039
2040 switch (header->fsf_status) {
2041 case FSF_HANDLE_MISMATCH:
2042 case FSF_PORT_HANDLE_NOT_VALID:
2043 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1");
2044 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2045 break;
2046 case FSF_FCPLUN_NOT_VALID:
2047 case FSF_LUN_HANDLE_NOT_VALID:
2048 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2049 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2050 break;
2051 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2052 zfcp_fsf_class_not_supp(req);
2053 break;
2054 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2055 dev_err(&req->adapter->ccw_device->dev,
2056 "Incorrect direction %d, LUN 0x%016Lx on port "
2057 "0x%016Lx closed\n",
2058 req->qtcb->bottom.io.data_direction,
2059 (unsigned long long)zfcp_scsi_dev_lun(sdev),
2060 (unsigned long long)zfcp_sdev->port->wwpn);
2061 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2062 "fssfch3");
2063 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2064 break;
2065 case FSF_CMND_LENGTH_NOT_VALID:
2066 dev_err(&req->adapter->ccw_device->dev,
2067 "Incorrect CDB length %d, LUN 0x%016Lx on "
2068 "port 0x%016Lx closed\n",
2069 req->qtcb->bottom.io.fcp_cmnd_length,
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 "fssfch4");
2074 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2075 break;
2076 case FSF_PORT_BOXED:
2077 zfcp_erp_set_port_status(zfcp_sdev->port,
2078 ZFCP_STATUS_COMMON_ACCESS_BOXED);
2079 zfcp_erp_port_reopen(zfcp_sdev->port,
2080 ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2081 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2082 break;
2083 case FSF_LUN_BOXED:
2084 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2085 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2086 "fssfch6");
2087 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2088 break;
2089 case FSF_ADAPTER_STATUS_AVAILABLE:
2090 if (header->fsf_status_qual.word[0] ==
2091 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2092 zfcp_fc_test_link(zfcp_sdev->port);
2093 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2094 break;
2095 }
2096 }
2097
2098 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2099 {
2100 struct scsi_cmnd *scpnt;
2101 struct fcp_resp_with_ext *fcp_rsp;
2102 unsigned long flags;
2103
2104 read_lock_irqsave(&req->adapter->abort_lock, flags);
2105
2106 scpnt = req->data;
2107 if (unlikely(!scpnt)) {
2108 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2109 return;
2110 }
2111
2112 zfcp_fsf_fcp_handler_common(req);
2113
2114 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2115 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2116 goto skip_fsfstatus;
2117 }
2118
2119 switch (req->qtcb->header.fsf_status) {
2120 case FSF_INCONSISTENT_PROT_DATA:
2121 case FSF_INVALID_PROT_PARM:
2122 set_host_byte(scpnt, DID_ERROR);
2123 goto skip_fsfstatus;
2124 case FSF_BLOCK_GUARD_CHECK_FAILURE:
2125 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2126 goto skip_fsfstatus;
2127 case FSF_APP_TAG_CHECK_FAILURE:
2128 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2129 goto skip_fsfstatus;
2130 case FSF_REF_TAG_CHECK_FAILURE:
2131 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2132 goto skip_fsfstatus;
2133 }
2134 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2135 zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2136
2137 skip_fsfstatus:
2138 zfcp_fsf_req_trace(req, scpnt);
2139 zfcp_dbf_scsi_result(scpnt, req);
2140
2141 scpnt->host_scribble = NULL;
2142 (scpnt->scsi_done) (scpnt);
2143 /*
2144 * We must hold this lock until scsi_done has been called.
2145 * Otherwise we may call scsi_done after abort regarding this
2146 * command has completed.
2147 * Note: scsi_done must not block!
2148 */
2149 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2150 }
2151
2152 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2153 {
2154 switch (scsi_get_prot_op(scsi_cmnd)) {
2155 case SCSI_PROT_NORMAL:
2156 switch (scsi_cmnd->sc_data_direction) {
2157 case DMA_NONE:
2158 *data_dir = FSF_DATADIR_CMND;
2159 break;
2160 case DMA_FROM_DEVICE:
2161 *data_dir = FSF_DATADIR_READ;
2162 break;
2163 case DMA_TO_DEVICE:
2164 *data_dir = FSF_DATADIR_WRITE;
2165 break;
2166 case DMA_BIDIRECTIONAL:
2167 return -EINVAL;
2168 }
2169 break;
2170
2171 case SCSI_PROT_READ_STRIP:
2172 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2173 break;
2174 case SCSI_PROT_WRITE_INSERT:
2175 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2176 break;
2177 case SCSI_PROT_READ_PASS:
2178 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2179 break;
2180 case SCSI_PROT_WRITE_PASS:
2181 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2182 break;
2183 default:
2184 return -EINVAL;
2185 }
2186
2187 return 0;
2188 }
2189
2190 /**
2191 * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2192 * @scsi_cmnd: scsi command to be sent
2193 */
2194 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2195 {
2196 struct zfcp_fsf_req *req;
2197 struct fcp_cmnd *fcp_cmnd;
2198 u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
2199 int retval = -EIO;
2200 struct scsi_device *sdev = scsi_cmnd->device;
2201 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2202 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2203 struct zfcp_qdio *qdio = adapter->qdio;
2204 struct fsf_qtcb_bottom_io *io;
2205 unsigned long flags;
2206
2207 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2208 ZFCP_STATUS_COMMON_UNBLOCKED)))
2209 return -EBUSY;
2210
2211 spin_lock_irqsave(&qdio->req_q_lock, flags);
2212 if (atomic_read(&qdio->req_q_free) <= 0) {
2213 atomic_inc(&qdio->req_q_full);
2214 goto out;
2215 }
2216
2217 if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2218 sbtype = SBAL_SFLAGS0_TYPE_WRITE;
2219
2220 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2221 sbtype, adapter->pool.scsi_req);
2222
2223 if (IS_ERR(req)) {
2224 retval = PTR_ERR(req);
2225 goto out;
2226 }
2227
2228 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2229
2230 io = &req->qtcb->bottom.io;
2231 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2232 req->data = scsi_cmnd;
2233 req->handler = zfcp_fsf_fcp_cmnd_handler;
2234 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2235 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2236 io->service_class = FSF_CLASS_3;
2237 io->fcp_cmnd_length = FCP_CMND_LEN;
2238
2239 if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2240 io->data_block_length = scsi_cmnd->device->sector_size;
2241 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2242 }
2243
2244 if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction))
2245 goto failed_scsi_cmnd;
2246
2247 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2248 zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd, 0);
2249
2250 if (scsi_prot_sg_count(scsi_cmnd)) {
2251 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2252 scsi_prot_sg_count(scsi_cmnd));
2253 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2254 scsi_prot_sglist(scsi_cmnd));
2255 if (retval)
2256 goto failed_scsi_cmnd;
2257 io->prot_data_length = zfcp_qdio_real_bytes(
2258 scsi_prot_sglist(scsi_cmnd));
2259 }
2260
2261 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2262 scsi_sglist(scsi_cmnd));
2263 if (unlikely(retval))
2264 goto failed_scsi_cmnd;
2265
2266 zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2267 if (zfcp_adapter_multi_buffer_active(adapter))
2268 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2269
2270 retval = zfcp_fsf_req_send(req);
2271 if (unlikely(retval))
2272 goto failed_scsi_cmnd;
2273
2274 goto out;
2275
2276 failed_scsi_cmnd:
2277 zfcp_fsf_req_free(req);
2278 scsi_cmnd->host_scribble = NULL;
2279 out:
2280 spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2281 return retval;
2282 }
2283
2284 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2285 {
2286 struct fcp_resp_with_ext *fcp_rsp;
2287 struct fcp_resp_rsp_info *rsp_info;
2288
2289 zfcp_fsf_fcp_handler_common(req);
2290
2291 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2292 rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2293
2294 if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2295 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2296 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2297 }
2298
2299 /**
2300 * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
2301 * @scmnd: SCSI command to send the task management command for
2302 * @tm_flags: unsigned byte for task management flags
2303 * Returns: on success pointer to struct fsf_req, NULL otherwise
2304 */
2305 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
2306 u8 tm_flags)
2307 {
2308 struct zfcp_fsf_req *req = NULL;
2309 struct fcp_cmnd *fcp_cmnd;
2310 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
2311 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2312
2313 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2314 ZFCP_STATUS_COMMON_UNBLOCKED)))
2315 return NULL;
2316
2317 spin_lock_irq(&qdio->req_q_lock);
2318 if (zfcp_qdio_sbal_get(qdio))
2319 goto out;
2320
2321 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2322 SBAL_SFLAGS0_TYPE_WRITE,
2323 qdio->adapter->pool.scsi_req);
2324
2325 if (IS_ERR(req)) {
2326 req = NULL;
2327 goto out;
2328 }
2329
2330 req->data = scmnd;
2331 req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2332 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2333 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2334 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2335 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2336 req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2337
2338 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2339
2340 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2341 zfcp_fc_scsi_to_fcp(fcp_cmnd, scmnd, tm_flags);
2342
2343 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2344 if (!zfcp_fsf_req_send(req))
2345 goto out;
2346
2347 zfcp_fsf_req_free(req);
2348 req = NULL;
2349 out:
2350 spin_unlock_irq(&qdio->req_q_lock);
2351 return req;
2352 }
2353
2354 /**
2355 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2356 * @adapter: pointer to struct zfcp_adapter
2357 * @sbal_idx: response queue index of SBAL to be processed
2358 */
2359 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2360 {
2361 struct zfcp_adapter *adapter = qdio->adapter;
2362 struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2363 struct qdio_buffer_element *sbale;
2364 struct zfcp_fsf_req *fsf_req;
2365 unsigned long req_id;
2366 int idx;
2367
2368 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2369
2370 sbale = &sbal->element[idx];
2371 req_id = (unsigned long) sbale->addr;
2372 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2373
2374 if (!fsf_req) {
2375 /*
2376 * Unknown request means that we have potentially memory
2377 * corruption and must stop the machine immediately.
2378 */
2379 zfcp_qdio_siosl(adapter);
2380 panic("error: unknown req_id (%lx) on adapter %s.\n",
2381 req_id, dev_name(&adapter->ccw_device->dev));
2382 }
2383
2384 fsf_req->qdio_req.sbal_response = sbal_idx;
2385 zfcp_fsf_req_complete(fsf_req);
2386
2387 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
2388 break;
2389 }
2390 }
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