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[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / s390 / scsi / zfcp_fsf.c
1 /*
2 * zfcp device driver
3 *
4 * Implementation of FSF commands.
5 *
6 * Copyright IBM Corp. 2002, 2015
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_ACT_UPDATED)
258 zfcp_cfdc_adapter_access_changed(adapter);
259 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
260 zfcp_fc_conditional_port_scan(adapter);
261 break;
262 case FSF_STATUS_READ_CFDC_UPDATED:
263 zfcp_cfdc_adapter_access_changed(adapter);
264 break;
265 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
266 adapter->adapter_features = sr_buf->payload.word[0];
267 break;
268 }
269
270 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
271 zfcp_fsf_req_free(req);
272
273 atomic_inc(&adapter->stat_miss);
274 queue_work(adapter->work_queue, &adapter->stat_work);
275 }
276
277 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
278 {
279 switch (req->qtcb->header.fsf_status_qual.word[0]) {
280 case FSF_SQ_FCP_RSP_AVAILABLE:
281 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
282 case FSF_SQ_NO_RETRY_POSSIBLE:
283 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
284 return;
285 case FSF_SQ_COMMAND_ABORTED:
286 break;
287 case FSF_SQ_NO_RECOM:
288 dev_err(&req->adapter->ccw_device->dev,
289 "The FCP adapter reported a problem "
290 "that cannot be recovered\n");
291 zfcp_qdio_siosl(req->adapter);
292 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1");
293 break;
294 }
295 /* all non-return stats set FSFREQ_ERROR*/
296 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
297 }
298
299 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
300 {
301 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
302 return;
303
304 switch (req->qtcb->header.fsf_status) {
305 case FSF_UNKNOWN_COMMAND:
306 dev_err(&req->adapter->ccw_device->dev,
307 "The FCP adapter does not recognize the command 0x%x\n",
308 req->qtcb->header.fsf_command);
309 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1");
310 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
311 break;
312 case FSF_ADAPTER_STATUS_AVAILABLE:
313 zfcp_fsf_fsfstatus_qual_eval(req);
314 break;
315 }
316 }
317
318 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
319 {
320 struct zfcp_adapter *adapter = req->adapter;
321 struct fsf_qtcb *qtcb = req->qtcb;
322 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
323
324 zfcp_dbf_hba_fsf_response(req);
325
326 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
327 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
328 return;
329 }
330
331 switch (qtcb->prefix.prot_status) {
332 case FSF_PROT_GOOD:
333 case FSF_PROT_FSF_STATUS_PRESENTED:
334 return;
335 case FSF_PROT_QTCB_VERSION_ERROR:
336 dev_err(&adapter->ccw_device->dev,
337 "QTCB version 0x%x not supported by FCP adapter "
338 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
339 psq->word[0], psq->word[1]);
340 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1");
341 break;
342 case FSF_PROT_ERROR_STATE:
343 case FSF_PROT_SEQ_NUMB_ERROR:
344 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2");
345 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
346 break;
347 case FSF_PROT_UNSUPP_QTCB_TYPE:
348 dev_err(&adapter->ccw_device->dev,
349 "The QTCB type is not supported by the FCP adapter\n");
350 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3");
351 break;
352 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
353 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
354 &adapter->status);
355 break;
356 case FSF_PROT_DUPLICATE_REQUEST_ID:
357 dev_err(&adapter->ccw_device->dev,
358 "0x%Lx is an ambiguous request identifier\n",
359 (unsigned long long)qtcb->bottom.support.req_handle);
360 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4");
361 break;
362 case FSF_PROT_LINK_DOWN:
363 zfcp_fsf_link_down_info_eval(req, &psq->link_down_info);
364 /* go through reopen to flush pending requests */
365 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6");
366 break;
367 case FSF_PROT_REEST_QUEUE:
368 /* All ports should be marked as ready to run again */
369 zfcp_erp_set_adapter_status(adapter,
370 ZFCP_STATUS_COMMON_RUNNING);
371 zfcp_erp_adapter_reopen(adapter,
372 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
373 ZFCP_STATUS_COMMON_ERP_FAILED,
374 "fspse_8");
375 break;
376 default:
377 dev_err(&adapter->ccw_device->dev,
378 "0x%x is not a valid transfer protocol status\n",
379 qtcb->prefix.prot_status);
380 zfcp_qdio_siosl(adapter);
381 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9");
382 }
383 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
384 }
385
386 /**
387 * zfcp_fsf_req_complete - process completion of a FSF request
388 * @fsf_req: The FSF request that has been completed.
389 *
390 * When a request has been completed either from the FCP adapter,
391 * or it has been dismissed due to a queue shutdown, this function
392 * is called to process the completion status and trigger further
393 * events related to the FSF request.
394 */
395 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
396 {
397 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
398 zfcp_fsf_status_read_handler(req);
399 return;
400 }
401
402 del_timer(&req->timer);
403 zfcp_fsf_protstatus_eval(req);
404 zfcp_fsf_fsfstatus_eval(req);
405 req->handler(req);
406
407 if (req->erp_action)
408 zfcp_erp_notify(req->erp_action, 0);
409
410 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
411 zfcp_fsf_req_free(req);
412 else
413 complete(&req->completion);
414 }
415
416 /**
417 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
418 * @adapter: pointer to struct zfcp_adapter
419 *
420 * Never ever call this without shutting down the adapter first.
421 * Otherwise the adapter would continue using and corrupting s390 storage.
422 * Included BUG_ON() call to ensure this is done.
423 * ERP is supposed to be the only user of this function.
424 */
425 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
426 {
427 struct zfcp_fsf_req *req, *tmp;
428 LIST_HEAD(remove_queue);
429
430 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
431 zfcp_reqlist_move(adapter->req_list, &remove_queue);
432
433 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
434 list_del(&req->list);
435 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
436 zfcp_fsf_req_complete(req);
437 }
438 }
439
440 #define ZFCP_FSF_PORTSPEED_1GBIT (1 << 0)
441 #define ZFCP_FSF_PORTSPEED_2GBIT (1 << 1)
442 #define ZFCP_FSF_PORTSPEED_4GBIT (1 << 2)
443 #define ZFCP_FSF_PORTSPEED_10GBIT (1 << 3)
444 #define ZFCP_FSF_PORTSPEED_8GBIT (1 << 4)
445 #define ZFCP_FSF_PORTSPEED_16GBIT (1 << 5)
446 #define ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED (1 << 15)
447
448 static u32 zfcp_fsf_convert_portspeed(u32 fsf_speed)
449 {
450 u32 fdmi_speed = 0;
451 if (fsf_speed & ZFCP_FSF_PORTSPEED_1GBIT)
452 fdmi_speed |= FC_PORTSPEED_1GBIT;
453 if (fsf_speed & ZFCP_FSF_PORTSPEED_2GBIT)
454 fdmi_speed |= FC_PORTSPEED_2GBIT;
455 if (fsf_speed & ZFCP_FSF_PORTSPEED_4GBIT)
456 fdmi_speed |= FC_PORTSPEED_4GBIT;
457 if (fsf_speed & ZFCP_FSF_PORTSPEED_10GBIT)
458 fdmi_speed |= FC_PORTSPEED_10GBIT;
459 if (fsf_speed & ZFCP_FSF_PORTSPEED_8GBIT)
460 fdmi_speed |= FC_PORTSPEED_8GBIT;
461 if (fsf_speed & ZFCP_FSF_PORTSPEED_16GBIT)
462 fdmi_speed |= FC_PORTSPEED_16GBIT;
463 if (fsf_speed & ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED)
464 fdmi_speed |= FC_PORTSPEED_NOT_NEGOTIATED;
465 return fdmi_speed;
466 }
467
468 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
469 {
470 struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
471 struct zfcp_adapter *adapter = req->adapter;
472 struct Scsi_Host *shost = adapter->scsi_host;
473 struct fc_els_flogi *nsp, *plogi;
474
475 /* adjust pointers for missing command code */
476 nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
477 - sizeof(u32));
478 plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
479 - sizeof(u32));
480
481 if (req->data)
482 memcpy(req->data, bottom, sizeof(*bottom));
483
484 fc_host_port_name(shost) = nsp->fl_wwpn;
485 fc_host_node_name(shost) = nsp->fl_wwnn;
486 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
487
488 adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK;
489 adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
490 (u16)FSF_STATUS_READS_RECOM);
491
492 if (fc_host_permanent_port_name(shost) == -1)
493 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
494
495 zfcp_scsi_set_prot(adapter);
496
497 /* no error return above here, otherwise must fix call chains */
498 /* do not evaluate invalid fields */
499 if (req->qtcb->header.fsf_status == FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE)
500 return 0;
501
502 fc_host_port_id(shost) = ntoh24(bottom->s_id);
503 fc_host_speed(shost) =
504 zfcp_fsf_convert_portspeed(bottom->fc_link_speed);
505
506 adapter->hydra_version = bottom->adapter_type;
507
508 switch (bottom->fc_topology) {
509 case FSF_TOPO_P2P:
510 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
511 adapter->peer_wwpn = plogi->fl_wwpn;
512 adapter->peer_wwnn = plogi->fl_wwnn;
513 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
514 break;
515 case FSF_TOPO_FABRIC:
516 if (bottom->connection_features & FSF_FEATURE_NPIV_MODE)
517 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
518 else
519 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
520 break;
521 case FSF_TOPO_AL:
522 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
523 /* fall through */
524 default:
525 dev_err(&adapter->ccw_device->dev,
526 "Unknown or unsupported arbitrated loop "
527 "fibre channel topology detected\n");
528 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1");
529 return -EIO;
530 }
531
532 return 0;
533 }
534
535 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
536 {
537 struct zfcp_adapter *adapter = req->adapter;
538 struct fsf_qtcb *qtcb = req->qtcb;
539 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
540 struct Scsi_Host *shost = adapter->scsi_host;
541
542 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
543 return;
544
545 adapter->fsf_lic_version = bottom->lic_version;
546 adapter->adapter_features = bottom->adapter_features;
547 adapter->connection_features = bottom->connection_features;
548 adapter->peer_wwpn = 0;
549 adapter->peer_wwnn = 0;
550 adapter->peer_d_id = 0;
551
552 switch (qtcb->header.fsf_status) {
553 case FSF_GOOD:
554 if (zfcp_fsf_exchange_config_evaluate(req))
555 return;
556
557 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
558 dev_err(&adapter->ccw_device->dev,
559 "FCP adapter maximum QTCB size (%d bytes) "
560 "is too small\n",
561 bottom->max_qtcb_size);
562 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1");
563 return;
564 }
565 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
566 &adapter->status);
567 break;
568 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
569 fc_host_node_name(shost) = 0;
570 fc_host_port_name(shost) = 0;
571 fc_host_port_id(shost) = 0;
572 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
573 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
574 adapter->hydra_version = 0;
575
576 /* avoids adapter shutdown to be able to recognize
577 * events such as LINK UP */
578 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
579 &adapter->status);
580 zfcp_fsf_link_down_info_eval(req,
581 &qtcb->header.fsf_status_qual.link_down_info);
582 if (zfcp_fsf_exchange_config_evaluate(req))
583 return;
584 break;
585 default:
586 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
587 return;
588 }
589
590 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
591 adapter->hardware_version = bottom->hardware_version;
592 memcpy(fc_host_serial_number(shost), bottom->serial_number,
593 min(FC_SERIAL_NUMBER_SIZE, 17));
594 EBCASC(fc_host_serial_number(shost),
595 min(FC_SERIAL_NUMBER_SIZE, 17));
596 }
597
598 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
599 dev_err(&adapter->ccw_device->dev,
600 "The FCP adapter only supports newer "
601 "control block versions\n");
602 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4");
603 return;
604 }
605 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
606 dev_err(&adapter->ccw_device->dev,
607 "The FCP adapter only supports older "
608 "control block versions\n");
609 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5");
610 }
611 }
612
613 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
614 {
615 struct zfcp_adapter *adapter = req->adapter;
616 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
617 struct Scsi_Host *shost = adapter->scsi_host;
618
619 if (req->data)
620 memcpy(req->data, bottom, sizeof(*bottom));
621
622 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
623 fc_host_permanent_port_name(shost) = bottom->wwpn;
624 } else
625 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
626 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
627 fc_host_supported_speeds(shost) =
628 zfcp_fsf_convert_portspeed(bottom->supported_speed);
629 memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
630 FC_FC4_LIST_SIZE);
631 memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
632 FC_FC4_LIST_SIZE);
633 }
634
635 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
636 {
637 struct fsf_qtcb *qtcb = req->qtcb;
638
639 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
640 return;
641
642 switch (qtcb->header.fsf_status) {
643 case FSF_GOOD:
644 zfcp_fsf_exchange_port_evaluate(req);
645 break;
646 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
647 zfcp_fsf_exchange_port_evaluate(req);
648 zfcp_fsf_link_down_info_eval(req,
649 &qtcb->header.fsf_status_qual.link_down_info);
650 break;
651 }
652 }
653
654 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
655 {
656 struct zfcp_fsf_req *req;
657
658 if (likely(pool))
659 req = mempool_alloc(pool, GFP_ATOMIC);
660 else
661 req = kmalloc(sizeof(*req), GFP_ATOMIC);
662
663 if (unlikely(!req))
664 return NULL;
665
666 memset(req, 0, sizeof(*req));
667 req->pool = pool;
668 return req;
669 }
670
671 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
672 {
673 struct fsf_qtcb *qtcb;
674
675 if (likely(pool))
676 qtcb = mempool_alloc(pool, GFP_ATOMIC);
677 else
678 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
679
680 if (unlikely(!qtcb))
681 return NULL;
682
683 memset(qtcb, 0, sizeof(*qtcb));
684 return qtcb;
685 }
686
687 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
688 u32 fsf_cmd, u8 sbtype,
689 mempool_t *pool)
690 {
691 struct zfcp_adapter *adapter = qdio->adapter;
692 struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
693
694 if (unlikely(!req))
695 return ERR_PTR(-ENOMEM);
696
697 if (adapter->req_no == 0)
698 adapter->req_no++;
699
700 INIT_LIST_HEAD(&req->list);
701 init_timer(&req->timer);
702 init_completion(&req->completion);
703
704 req->adapter = adapter;
705 req->fsf_command = fsf_cmd;
706 req->req_id = adapter->req_no;
707
708 if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
709 if (likely(pool))
710 req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
711 else
712 req->qtcb = zfcp_qtcb_alloc(NULL);
713
714 if (unlikely(!req->qtcb)) {
715 zfcp_fsf_req_free(req);
716 return ERR_PTR(-ENOMEM);
717 }
718
719 req->seq_no = adapter->fsf_req_seq_no;
720 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
721 req->qtcb->prefix.req_id = req->req_id;
722 req->qtcb->prefix.ulp_info = 26;
723 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
724 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
725 req->qtcb->header.req_handle = req->req_id;
726 req->qtcb->header.fsf_command = req->fsf_command;
727 }
728
729 zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
730 req->qtcb, sizeof(struct fsf_qtcb));
731
732 return req;
733 }
734
735 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
736 {
737 struct zfcp_adapter *adapter = req->adapter;
738 struct zfcp_qdio *qdio = adapter->qdio;
739 int with_qtcb = (req->qtcb != NULL);
740 int req_id = req->req_id;
741
742 zfcp_reqlist_add(adapter->req_list, req);
743
744 req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
745 req->issued = get_tod_clock();
746 if (zfcp_qdio_send(qdio, &req->qdio_req)) {
747 del_timer(&req->timer);
748 /* lookup request again, list might have changed */
749 zfcp_reqlist_find_rm(adapter->req_list, req_id);
750 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
751 return -EIO;
752 }
753
754 /* Don't increase for unsolicited status */
755 if (with_qtcb)
756 adapter->fsf_req_seq_no++;
757 adapter->req_no++;
758
759 return 0;
760 }
761
762 /**
763 * zfcp_fsf_status_read - send status read request
764 * @adapter: pointer to struct zfcp_adapter
765 * @req_flags: request flags
766 * Returns: 0 on success, ERROR otherwise
767 */
768 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
769 {
770 struct zfcp_adapter *adapter = qdio->adapter;
771 struct zfcp_fsf_req *req;
772 struct fsf_status_read_buffer *sr_buf;
773 struct page *page;
774 int retval = -EIO;
775
776 spin_lock_irq(&qdio->req_q_lock);
777 if (zfcp_qdio_sbal_get(qdio))
778 goto out;
779
780 req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS, 0,
781 adapter->pool.status_read_req);
782 if (IS_ERR(req)) {
783 retval = PTR_ERR(req);
784 goto out;
785 }
786
787 page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
788 if (!page) {
789 retval = -ENOMEM;
790 goto failed_buf;
791 }
792 sr_buf = page_address(page);
793 memset(sr_buf, 0, sizeof(*sr_buf));
794 req->data = sr_buf;
795
796 zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
797 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
798
799 retval = zfcp_fsf_req_send(req);
800 if (retval)
801 goto failed_req_send;
802
803 goto out;
804
805 failed_req_send:
806 req->data = NULL;
807 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
808 failed_buf:
809 zfcp_dbf_hba_fsf_uss("fssr__1", req);
810 zfcp_fsf_req_free(req);
811 out:
812 spin_unlock_irq(&qdio->req_q_lock);
813 return retval;
814 }
815
816 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
817 {
818 struct scsi_device *sdev = req->data;
819 struct zfcp_scsi_dev *zfcp_sdev;
820 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
821
822 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
823 return;
824
825 zfcp_sdev = sdev_to_zfcp(sdev);
826
827 switch (req->qtcb->header.fsf_status) {
828 case FSF_PORT_HANDLE_NOT_VALID:
829 if (fsq->word[0] == fsq->word[1]) {
830 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
831 "fsafch1");
832 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
833 }
834 break;
835 case FSF_LUN_HANDLE_NOT_VALID:
836 if (fsq->word[0] == fsq->word[1]) {
837 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
838 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
839 }
840 break;
841 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
842 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
843 break;
844 case FSF_PORT_BOXED:
845 zfcp_erp_set_port_status(zfcp_sdev->port,
846 ZFCP_STATUS_COMMON_ACCESS_BOXED);
847 zfcp_erp_port_reopen(zfcp_sdev->port,
848 ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
849 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
850 break;
851 case FSF_LUN_BOXED:
852 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
853 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
854 "fsafch4");
855 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
856 break;
857 case FSF_ADAPTER_STATUS_AVAILABLE:
858 switch (fsq->word[0]) {
859 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
860 zfcp_fc_test_link(zfcp_sdev->port);
861 /* fall through */
862 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
863 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
864 break;
865 }
866 break;
867 case FSF_GOOD:
868 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
869 break;
870 }
871 }
872
873 /**
874 * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
875 * @scmnd: The SCSI command to abort
876 * Returns: pointer to struct zfcp_fsf_req
877 */
878
879 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
880 {
881 struct zfcp_fsf_req *req = NULL;
882 struct scsi_device *sdev = scmnd->device;
883 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
884 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
885 unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
886
887 spin_lock_irq(&qdio->req_q_lock);
888 if (zfcp_qdio_sbal_get(qdio))
889 goto out;
890 req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
891 SBAL_SFLAGS0_TYPE_READ,
892 qdio->adapter->pool.scsi_abort);
893 if (IS_ERR(req)) {
894 req = NULL;
895 goto out;
896 }
897
898 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
899 ZFCP_STATUS_COMMON_UNBLOCKED)))
900 goto out_error_free;
901
902 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
903
904 req->data = sdev;
905 req->handler = zfcp_fsf_abort_fcp_command_handler;
906 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
907 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
908 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
909
910 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
911 if (!zfcp_fsf_req_send(req))
912 goto out;
913
914 out_error_free:
915 zfcp_fsf_req_free(req);
916 req = NULL;
917 out:
918 spin_unlock_irq(&qdio->req_q_lock);
919 return req;
920 }
921
922 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
923 {
924 struct zfcp_adapter *adapter = req->adapter;
925 struct zfcp_fsf_ct_els *ct = req->data;
926 struct fsf_qtcb_header *header = &req->qtcb->header;
927
928 ct->status = -EINVAL;
929
930 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
931 goto skip_fsfstatus;
932
933 switch (header->fsf_status) {
934 case FSF_GOOD:
935 zfcp_dbf_san_res("fsscth2", req);
936 ct->status = 0;
937 break;
938 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
939 zfcp_fsf_class_not_supp(req);
940 break;
941 case FSF_ADAPTER_STATUS_AVAILABLE:
942 switch (header->fsf_status_qual.word[0]){
943 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
944 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
945 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
946 break;
947 }
948 break;
949 case FSF_ACCESS_DENIED:
950 break;
951 case FSF_PORT_BOXED:
952 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
953 break;
954 case FSF_PORT_HANDLE_NOT_VALID:
955 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
956 /* fall through */
957 case FSF_GENERIC_COMMAND_REJECTED:
958 case FSF_PAYLOAD_SIZE_MISMATCH:
959 case FSF_REQUEST_SIZE_TOO_LARGE:
960 case FSF_RESPONSE_SIZE_TOO_LARGE:
961 case FSF_SBAL_MISMATCH:
962 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
963 break;
964 }
965
966 skip_fsfstatus:
967 if (ct->handler)
968 ct->handler(ct->handler_data);
969 }
970
971 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
972 struct zfcp_qdio_req *q_req,
973 struct scatterlist *sg_req,
974 struct scatterlist *sg_resp)
975 {
976 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
977 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
978 zfcp_qdio_set_sbale_last(qdio, q_req);
979 }
980
981 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
982 struct scatterlist *sg_req,
983 struct scatterlist *sg_resp)
984 {
985 struct zfcp_adapter *adapter = req->adapter;
986 struct zfcp_qdio *qdio = adapter->qdio;
987 struct fsf_qtcb *qtcb = req->qtcb;
988 u32 feat = adapter->adapter_features;
989
990 if (zfcp_adapter_multi_buffer_active(adapter)) {
991 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
992 return -EIO;
993 qtcb->bottom.support.req_buf_length =
994 zfcp_qdio_real_bytes(sg_req);
995 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
996 return -EIO;
997 qtcb->bottom.support.resp_buf_length =
998 zfcp_qdio_real_bytes(sg_resp);
999
1000 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
1001 zfcp_qdio_sbale_count(sg_req));
1002 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1003 zfcp_qdio_set_scount(qdio, &req->qdio_req);
1004 return 0;
1005 }
1006
1007 /* use single, unchained SBAL if it can hold the request */
1008 if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
1009 zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req,
1010 sg_req, sg_resp);
1011 return 0;
1012 }
1013
1014 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS))
1015 return -EOPNOTSUPP;
1016
1017 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
1018 return -EIO;
1019
1020 qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req);
1021
1022 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1023 zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req);
1024
1025 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
1026 return -EIO;
1027
1028 qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp);
1029
1030 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1031
1032 return 0;
1033 }
1034
1035 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1036 struct scatterlist *sg_req,
1037 struct scatterlist *sg_resp,
1038 unsigned int timeout)
1039 {
1040 int ret;
1041
1042 ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
1043 if (ret)
1044 return ret;
1045
1046 /* common settings for ct/gs and els requests */
1047 if (timeout > 255)
1048 timeout = 255; /* max value accepted by hardware */
1049 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1050 req->qtcb->bottom.support.timeout = timeout;
1051 zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1052
1053 return 0;
1054 }
1055
1056 /**
1057 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1058 * @ct: pointer to struct zfcp_send_ct with data for request
1059 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1060 */
1061 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1062 struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1063 unsigned int timeout)
1064 {
1065 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1066 struct zfcp_fsf_req *req;
1067 int ret = -EIO;
1068
1069 spin_lock_irq(&qdio->req_q_lock);
1070 if (zfcp_qdio_sbal_get(qdio))
1071 goto out;
1072
1073 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1074 SBAL_SFLAGS0_TYPE_WRITE_READ, pool);
1075
1076 if (IS_ERR(req)) {
1077 ret = PTR_ERR(req);
1078 goto out;
1079 }
1080
1081 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1082 ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1083 if (ret)
1084 goto failed_send;
1085
1086 req->handler = zfcp_fsf_send_ct_handler;
1087 req->qtcb->header.port_handle = wka_port->handle;
1088 ct->d_id = wka_port->d_id;
1089 req->data = ct;
1090
1091 zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1092
1093 ret = zfcp_fsf_req_send(req);
1094 if (ret)
1095 goto failed_send;
1096
1097 goto out;
1098
1099 failed_send:
1100 zfcp_fsf_req_free(req);
1101 out:
1102 spin_unlock_irq(&qdio->req_q_lock);
1103 return ret;
1104 }
1105
1106 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1107 {
1108 struct zfcp_fsf_ct_els *send_els = req->data;
1109 struct zfcp_port *port = send_els->port;
1110 struct fsf_qtcb_header *header = &req->qtcb->header;
1111
1112 send_els->status = -EINVAL;
1113
1114 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1115 goto skip_fsfstatus;
1116
1117 switch (header->fsf_status) {
1118 case FSF_GOOD:
1119 zfcp_dbf_san_res("fsselh1", req);
1120 send_els->status = 0;
1121 break;
1122 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1123 zfcp_fsf_class_not_supp(req);
1124 break;
1125 case FSF_ADAPTER_STATUS_AVAILABLE:
1126 switch (header->fsf_status_qual.word[0]){
1127 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1128 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1129 case FSF_SQ_RETRY_IF_POSSIBLE:
1130 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1131 break;
1132 }
1133 break;
1134 case FSF_ELS_COMMAND_REJECTED:
1135 case FSF_PAYLOAD_SIZE_MISMATCH:
1136 case FSF_REQUEST_SIZE_TOO_LARGE:
1137 case FSF_RESPONSE_SIZE_TOO_LARGE:
1138 break;
1139 case FSF_ACCESS_DENIED:
1140 if (port) {
1141 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1142 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1143 }
1144 break;
1145 case FSF_SBAL_MISMATCH:
1146 /* should never occur, avoided in zfcp_fsf_send_els */
1147 /* fall through */
1148 default:
1149 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1150 break;
1151 }
1152 skip_fsfstatus:
1153 if (send_els->handler)
1154 send_els->handler(send_els->handler_data);
1155 }
1156
1157 /**
1158 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1159 * @els: pointer to struct zfcp_send_els with data for the command
1160 */
1161 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1162 struct zfcp_fsf_ct_els *els, unsigned int timeout)
1163 {
1164 struct zfcp_fsf_req *req;
1165 struct zfcp_qdio *qdio = adapter->qdio;
1166 int ret = -EIO;
1167
1168 spin_lock_irq(&qdio->req_q_lock);
1169 if (zfcp_qdio_sbal_get(qdio))
1170 goto out;
1171
1172 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1173 SBAL_SFLAGS0_TYPE_WRITE_READ, NULL);
1174
1175 if (IS_ERR(req)) {
1176 ret = PTR_ERR(req);
1177 goto out;
1178 }
1179
1180 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1181
1182 if (!zfcp_adapter_multi_buffer_active(adapter))
1183 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1184
1185 ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1186
1187 if (ret)
1188 goto failed_send;
1189
1190 hton24(req->qtcb->bottom.support.d_id, d_id);
1191 req->handler = zfcp_fsf_send_els_handler;
1192 els->d_id = d_id;
1193 req->data = els;
1194
1195 zfcp_dbf_san_req("fssels1", req, d_id);
1196
1197 ret = zfcp_fsf_req_send(req);
1198 if (ret)
1199 goto failed_send;
1200
1201 goto out;
1202
1203 failed_send:
1204 zfcp_fsf_req_free(req);
1205 out:
1206 spin_unlock_irq(&qdio->req_q_lock);
1207 return ret;
1208 }
1209
1210 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1211 {
1212 struct zfcp_fsf_req *req;
1213 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1214 int retval = -EIO;
1215
1216 spin_lock_irq(&qdio->req_q_lock);
1217 if (zfcp_qdio_sbal_get(qdio))
1218 goto out;
1219
1220 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1221 SBAL_SFLAGS0_TYPE_READ,
1222 qdio->adapter->pool.erp_req);
1223
1224 if (IS_ERR(req)) {
1225 retval = PTR_ERR(req);
1226 goto out;
1227 }
1228
1229 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1230 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1231
1232 req->qtcb->bottom.config.feature_selection =
1233 FSF_FEATURE_CFDC |
1234 FSF_FEATURE_LUN_SHARING |
1235 FSF_FEATURE_NOTIFICATION_LOST |
1236 FSF_FEATURE_UPDATE_ALERT;
1237 req->erp_action = erp_action;
1238 req->handler = zfcp_fsf_exchange_config_data_handler;
1239 erp_action->fsf_req_id = req->req_id;
1240
1241 zfcp_fsf_start_erp_timer(req);
1242 retval = zfcp_fsf_req_send(req);
1243 if (retval) {
1244 zfcp_fsf_req_free(req);
1245 erp_action->fsf_req_id = 0;
1246 }
1247 out:
1248 spin_unlock_irq(&qdio->req_q_lock);
1249 return retval;
1250 }
1251
1252 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1253 struct fsf_qtcb_bottom_config *data)
1254 {
1255 struct zfcp_fsf_req *req = NULL;
1256 int retval = -EIO;
1257
1258 spin_lock_irq(&qdio->req_q_lock);
1259 if (zfcp_qdio_sbal_get(qdio))
1260 goto out_unlock;
1261
1262 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1263 SBAL_SFLAGS0_TYPE_READ, NULL);
1264
1265 if (IS_ERR(req)) {
1266 retval = PTR_ERR(req);
1267 goto out_unlock;
1268 }
1269
1270 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1271 req->handler = zfcp_fsf_exchange_config_data_handler;
1272
1273 req->qtcb->bottom.config.feature_selection =
1274 FSF_FEATURE_CFDC |
1275 FSF_FEATURE_LUN_SHARING |
1276 FSF_FEATURE_NOTIFICATION_LOST |
1277 FSF_FEATURE_UPDATE_ALERT;
1278
1279 if (data)
1280 req->data = data;
1281
1282 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1283 retval = zfcp_fsf_req_send(req);
1284 spin_unlock_irq(&qdio->req_q_lock);
1285 if (!retval)
1286 wait_for_completion(&req->completion);
1287
1288 zfcp_fsf_req_free(req);
1289 return retval;
1290
1291 out_unlock:
1292 spin_unlock_irq(&qdio->req_q_lock);
1293 return retval;
1294 }
1295
1296 /**
1297 * zfcp_fsf_exchange_port_data - request information about local port
1298 * @erp_action: ERP action for the adapter for which port data is requested
1299 * Returns: 0 on success, error otherwise
1300 */
1301 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1302 {
1303 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1304 struct zfcp_fsf_req *req;
1305 int retval = -EIO;
1306
1307 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1308 return -EOPNOTSUPP;
1309
1310 spin_lock_irq(&qdio->req_q_lock);
1311 if (zfcp_qdio_sbal_get(qdio))
1312 goto out;
1313
1314 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1315 SBAL_SFLAGS0_TYPE_READ,
1316 qdio->adapter->pool.erp_req);
1317
1318 if (IS_ERR(req)) {
1319 retval = PTR_ERR(req);
1320 goto out;
1321 }
1322
1323 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1324 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1325
1326 req->handler = zfcp_fsf_exchange_port_data_handler;
1327 req->erp_action = erp_action;
1328 erp_action->fsf_req_id = req->req_id;
1329
1330 zfcp_fsf_start_erp_timer(req);
1331 retval = zfcp_fsf_req_send(req);
1332 if (retval) {
1333 zfcp_fsf_req_free(req);
1334 erp_action->fsf_req_id = 0;
1335 }
1336 out:
1337 spin_unlock_irq(&qdio->req_q_lock);
1338 return retval;
1339 }
1340
1341 /**
1342 * zfcp_fsf_exchange_port_data_sync - request information about local port
1343 * @qdio: pointer to struct zfcp_qdio
1344 * @data: pointer to struct fsf_qtcb_bottom_port
1345 * Returns: 0 on success, error otherwise
1346 */
1347 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1348 struct fsf_qtcb_bottom_port *data)
1349 {
1350 struct zfcp_fsf_req *req = NULL;
1351 int retval = -EIO;
1352
1353 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1354 return -EOPNOTSUPP;
1355
1356 spin_lock_irq(&qdio->req_q_lock);
1357 if (zfcp_qdio_sbal_get(qdio))
1358 goto out_unlock;
1359
1360 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1361 SBAL_SFLAGS0_TYPE_READ, NULL);
1362
1363 if (IS_ERR(req)) {
1364 retval = PTR_ERR(req);
1365 goto out_unlock;
1366 }
1367
1368 if (data)
1369 req->data = data;
1370
1371 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1372
1373 req->handler = zfcp_fsf_exchange_port_data_handler;
1374 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1375 retval = zfcp_fsf_req_send(req);
1376 spin_unlock_irq(&qdio->req_q_lock);
1377
1378 if (!retval)
1379 wait_for_completion(&req->completion);
1380
1381 zfcp_fsf_req_free(req);
1382
1383 return retval;
1384
1385 out_unlock:
1386 spin_unlock_irq(&qdio->req_q_lock);
1387 return retval;
1388 }
1389
1390 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1391 {
1392 struct zfcp_port *port = req->data;
1393 struct fsf_qtcb_header *header = &req->qtcb->header;
1394 struct fc_els_flogi *plogi;
1395
1396 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1397 goto out;
1398
1399 switch (header->fsf_status) {
1400 case FSF_PORT_ALREADY_OPEN:
1401 break;
1402 case FSF_ACCESS_DENIED:
1403 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1404 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1405 break;
1406 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1407 dev_warn(&req->adapter->ccw_device->dev,
1408 "Not enough FCP adapter resources to open "
1409 "remote port 0x%016Lx\n",
1410 (unsigned long long)port->wwpn);
1411 zfcp_erp_set_port_status(port,
1412 ZFCP_STATUS_COMMON_ERP_FAILED);
1413 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1414 break;
1415 case FSF_ADAPTER_STATUS_AVAILABLE:
1416 switch (header->fsf_status_qual.word[0]) {
1417 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1418 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1419 case FSF_SQ_NO_RETRY_POSSIBLE:
1420 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1421 break;
1422 }
1423 break;
1424 case FSF_GOOD:
1425 port->handle = header->port_handle;
1426 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1427 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1428 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1429 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1430 &port->status);
1431 /* check whether D_ID has changed during open */
1432 /*
1433 * FIXME: This check is not airtight, as the FCP channel does
1434 * not monitor closures of target port connections caused on
1435 * the remote side. Thus, they might miss out on invalidating
1436 * locally cached WWPNs (and other N_Port parameters) of gone
1437 * target ports. So, our heroic attempt to make things safe
1438 * could be undermined by 'open port' response data tagged with
1439 * obsolete WWPNs. Another reason to monitor potential
1440 * connection closures ourself at least (by interpreting
1441 * incoming ELS' and unsolicited status). It just crosses my
1442 * mind that one should be able to cross-check by means of
1443 * another GID_PN straight after a port has been opened.
1444 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1445 */
1446 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1447 if (req->qtcb->bottom.support.els1_length >=
1448 FSF_PLOGI_MIN_LEN)
1449 zfcp_fc_plogi_evaluate(port, plogi);
1450 break;
1451 case FSF_UNKNOWN_OP_SUBTYPE:
1452 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1453 break;
1454 }
1455
1456 out:
1457 put_device(&port->dev);
1458 }
1459
1460 /**
1461 * zfcp_fsf_open_port - create and send open port request
1462 * @erp_action: pointer to struct zfcp_erp_action
1463 * Returns: 0 on success, error otherwise
1464 */
1465 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1466 {
1467 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1468 struct zfcp_port *port = erp_action->port;
1469 struct zfcp_fsf_req *req;
1470 int retval = -EIO;
1471
1472 spin_lock_irq(&qdio->req_q_lock);
1473 if (zfcp_qdio_sbal_get(qdio))
1474 goto out;
1475
1476 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1477 SBAL_SFLAGS0_TYPE_READ,
1478 qdio->adapter->pool.erp_req);
1479
1480 if (IS_ERR(req)) {
1481 retval = PTR_ERR(req);
1482 goto out;
1483 }
1484
1485 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1486 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1487
1488 req->handler = zfcp_fsf_open_port_handler;
1489 hton24(req->qtcb->bottom.support.d_id, port->d_id);
1490 req->data = port;
1491 req->erp_action = erp_action;
1492 erp_action->fsf_req_id = req->req_id;
1493 get_device(&port->dev);
1494
1495 zfcp_fsf_start_erp_timer(req);
1496 retval = zfcp_fsf_req_send(req);
1497 if (retval) {
1498 zfcp_fsf_req_free(req);
1499 erp_action->fsf_req_id = 0;
1500 put_device(&port->dev);
1501 }
1502 out:
1503 spin_unlock_irq(&qdio->req_q_lock);
1504 return retval;
1505 }
1506
1507 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1508 {
1509 struct zfcp_port *port = req->data;
1510
1511 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1512 return;
1513
1514 switch (req->qtcb->header.fsf_status) {
1515 case FSF_PORT_HANDLE_NOT_VALID:
1516 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1517 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1518 break;
1519 case FSF_ADAPTER_STATUS_AVAILABLE:
1520 break;
1521 case FSF_GOOD:
1522 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1523 break;
1524 }
1525 }
1526
1527 /**
1528 * zfcp_fsf_close_port - create and send close port request
1529 * @erp_action: pointer to struct zfcp_erp_action
1530 * Returns: 0 on success, error otherwise
1531 */
1532 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1533 {
1534 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1535 struct zfcp_fsf_req *req;
1536 int retval = -EIO;
1537
1538 spin_lock_irq(&qdio->req_q_lock);
1539 if (zfcp_qdio_sbal_get(qdio))
1540 goto out;
1541
1542 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1543 SBAL_SFLAGS0_TYPE_READ,
1544 qdio->adapter->pool.erp_req);
1545
1546 if (IS_ERR(req)) {
1547 retval = PTR_ERR(req);
1548 goto out;
1549 }
1550
1551 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1552 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1553
1554 req->handler = zfcp_fsf_close_port_handler;
1555 req->data = erp_action->port;
1556 req->erp_action = erp_action;
1557 req->qtcb->header.port_handle = erp_action->port->handle;
1558 erp_action->fsf_req_id = req->req_id;
1559
1560 zfcp_fsf_start_erp_timer(req);
1561 retval = zfcp_fsf_req_send(req);
1562 if (retval) {
1563 zfcp_fsf_req_free(req);
1564 erp_action->fsf_req_id = 0;
1565 }
1566 out:
1567 spin_unlock_irq(&qdio->req_q_lock);
1568 return retval;
1569 }
1570
1571 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1572 {
1573 struct zfcp_fc_wka_port *wka_port = req->data;
1574 struct fsf_qtcb_header *header = &req->qtcb->header;
1575
1576 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1577 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1578 goto out;
1579 }
1580
1581 switch (header->fsf_status) {
1582 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1583 dev_warn(&req->adapter->ccw_device->dev,
1584 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1585 /* fall through */
1586 case FSF_ADAPTER_STATUS_AVAILABLE:
1587 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1588 /* fall through */
1589 case FSF_ACCESS_DENIED:
1590 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1591 break;
1592 case FSF_GOOD:
1593 wka_port->handle = header->port_handle;
1594 /* fall through */
1595 case FSF_PORT_ALREADY_OPEN:
1596 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1597 }
1598 out:
1599 wake_up(&wka_port->completion_wq);
1600 }
1601
1602 /**
1603 * zfcp_fsf_open_wka_port - create and send open wka-port request
1604 * @wka_port: pointer to struct zfcp_fc_wka_port
1605 * Returns: 0 on success, error otherwise
1606 */
1607 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1608 {
1609 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1610 struct zfcp_fsf_req *req;
1611 int retval = -EIO;
1612
1613 spin_lock_irq(&qdio->req_q_lock);
1614 if (zfcp_qdio_sbal_get(qdio))
1615 goto out;
1616
1617 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1618 SBAL_SFLAGS0_TYPE_READ,
1619 qdio->adapter->pool.erp_req);
1620
1621 if (IS_ERR(req)) {
1622 retval = PTR_ERR(req);
1623 goto out;
1624 }
1625
1626 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1627 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1628
1629 req->handler = zfcp_fsf_open_wka_port_handler;
1630 hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1631 req->data = wka_port;
1632
1633 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1634 retval = zfcp_fsf_req_send(req);
1635 if (retval)
1636 zfcp_fsf_req_free(req);
1637 out:
1638 spin_unlock_irq(&qdio->req_q_lock);
1639 if (!retval)
1640 zfcp_dbf_rec_run_wka("fsowp_1", wka_port, req->req_id);
1641 return retval;
1642 }
1643
1644 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1645 {
1646 struct zfcp_fc_wka_port *wka_port = req->data;
1647
1648 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1649 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1650 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1651 }
1652
1653 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1654 wake_up(&wka_port->completion_wq);
1655 }
1656
1657 /**
1658 * zfcp_fsf_close_wka_port - create and send close wka port request
1659 * @wka_port: WKA port to open
1660 * Returns: 0 on success, error otherwise
1661 */
1662 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1663 {
1664 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1665 struct zfcp_fsf_req *req;
1666 int retval = -EIO;
1667
1668 spin_lock_irq(&qdio->req_q_lock);
1669 if (zfcp_qdio_sbal_get(qdio))
1670 goto out;
1671
1672 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1673 SBAL_SFLAGS0_TYPE_READ,
1674 qdio->adapter->pool.erp_req);
1675
1676 if (IS_ERR(req)) {
1677 retval = PTR_ERR(req);
1678 goto out;
1679 }
1680
1681 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1682 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1683
1684 req->handler = zfcp_fsf_close_wka_port_handler;
1685 req->data = wka_port;
1686 req->qtcb->header.port_handle = wka_port->handle;
1687
1688 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1689 retval = zfcp_fsf_req_send(req);
1690 if (retval)
1691 zfcp_fsf_req_free(req);
1692 out:
1693 spin_unlock_irq(&qdio->req_q_lock);
1694 if (!retval)
1695 zfcp_dbf_rec_run_wka("fscwp_1", wka_port, req->req_id);
1696 return retval;
1697 }
1698
1699 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1700 {
1701 struct zfcp_port *port = req->data;
1702 struct fsf_qtcb_header *header = &req->qtcb->header;
1703 struct scsi_device *sdev;
1704
1705 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1706 return;
1707
1708 switch (header->fsf_status) {
1709 case FSF_PORT_HANDLE_NOT_VALID:
1710 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
1711 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1712 break;
1713 case FSF_ACCESS_DENIED:
1714 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1715 break;
1716 case FSF_PORT_BOXED:
1717 /* can't use generic zfcp_erp_modify_port_status because
1718 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1719 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1720 shost_for_each_device(sdev, port->adapter->scsi_host)
1721 if (sdev_to_zfcp(sdev)->port == port)
1722 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1723 &sdev_to_zfcp(sdev)->status);
1724 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1725 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1726 "fscpph2");
1727 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1728 break;
1729 case FSF_ADAPTER_STATUS_AVAILABLE:
1730 switch (header->fsf_status_qual.word[0]) {
1731 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1732 /* fall through */
1733 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1734 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1735 break;
1736 }
1737 break;
1738 case FSF_GOOD:
1739 /* can't use generic zfcp_erp_modify_port_status because
1740 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1741 */
1742 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1743 shost_for_each_device(sdev, port->adapter->scsi_host)
1744 if (sdev_to_zfcp(sdev)->port == port)
1745 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1746 &sdev_to_zfcp(sdev)->status);
1747 break;
1748 }
1749 }
1750
1751 /**
1752 * zfcp_fsf_close_physical_port - close physical port
1753 * @erp_action: pointer to struct zfcp_erp_action
1754 * Returns: 0 on success
1755 */
1756 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1757 {
1758 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1759 struct zfcp_fsf_req *req;
1760 int retval = -EIO;
1761
1762 spin_lock_irq(&qdio->req_q_lock);
1763 if (zfcp_qdio_sbal_get(qdio))
1764 goto out;
1765
1766 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1767 SBAL_SFLAGS0_TYPE_READ,
1768 qdio->adapter->pool.erp_req);
1769
1770 if (IS_ERR(req)) {
1771 retval = PTR_ERR(req);
1772 goto out;
1773 }
1774
1775 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1776 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1777
1778 req->data = erp_action->port;
1779 req->qtcb->header.port_handle = erp_action->port->handle;
1780 req->erp_action = erp_action;
1781 req->handler = zfcp_fsf_close_physical_port_handler;
1782 erp_action->fsf_req_id = req->req_id;
1783
1784 zfcp_fsf_start_erp_timer(req);
1785 retval = zfcp_fsf_req_send(req);
1786 if (retval) {
1787 zfcp_fsf_req_free(req);
1788 erp_action->fsf_req_id = 0;
1789 }
1790 out:
1791 spin_unlock_irq(&qdio->req_q_lock);
1792 return retval;
1793 }
1794
1795 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1796 {
1797 struct zfcp_adapter *adapter = req->adapter;
1798 struct scsi_device *sdev = req->data;
1799 struct zfcp_scsi_dev *zfcp_sdev;
1800 struct fsf_qtcb_header *header = &req->qtcb->header;
1801 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1802
1803 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1804 return;
1805
1806 zfcp_sdev = sdev_to_zfcp(sdev);
1807
1808 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1809 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1810 ZFCP_STATUS_LUN_SHARED |
1811 ZFCP_STATUS_LUN_READONLY,
1812 &zfcp_sdev->status);
1813
1814 switch (header->fsf_status) {
1815
1816 case FSF_PORT_HANDLE_NOT_VALID:
1817 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
1818 /* fall through */
1819 case FSF_LUN_ALREADY_OPEN:
1820 break;
1821 case FSF_ACCESS_DENIED:
1822 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
1823 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1824 break;
1825 case FSF_PORT_BOXED:
1826 zfcp_erp_set_port_status(zfcp_sdev->port,
1827 ZFCP_STATUS_COMMON_ACCESS_BOXED);
1828 zfcp_erp_port_reopen(zfcp_sdev->port,
1829 ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
1830 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1831 break;
1832 case FSF_LUN_SHARING_VIOLATION:
1833 zfcp_cfdc_lun_shrng_vltn(sdev, &header->fsf_status_qual);
1834 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1835 break;
1836 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1837 dev_warn(&adapter->ccw_device->dev,
1838 "No handle is available for LUN "
1839 "0x%016Lx on port 0x%016Lx\n",
1840 (unsigned long long)zfcp_scsi_dev_lun(sdev),
1841 (unsigned long long)zfcp_sdev->port->wwpn);
1842 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1843 /* fall through */
1844 case FSF_INVALID_COMMAND_OPTION:
1845 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1846 break;
1847 case FSF_ADAPTER_STATUS_AVAILABLE:
1848 switch (header->fsf_status_qual.word[0]) {
1849 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1850 zfcp_fc_test_link(zfcp_sdev->port);
1851 /* fall through */
1852 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1853 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1854 break;
1855 }
1856 break;
1857
1858 case FSF_GOOD:
1859 zfcp_sdev->lun_handle = header->lun_handle;
1860 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1861 zfcp_cfdc_open_lun_eval(sdev, bottom);
1862 break;
1863 }
1864 }
1865
1866 /**
1867 * zfcp_fsf_open_lun - open LUN
1868 * @erp_action: pointer to struct zfcp_erp_action
1869 * Returns: 0 on success, error otherwise
1870 */
1871 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1872 {
1873 struct zfcp_adapter *adapter = erp_action->adapter;
1874 struct zfcp_qdio *qdio = adapter->qdio;
1875 struct zfcp_fsf_req *req;
1876 int retval = -EIO;
1877
1878 spin_lock_irq(&qdio->req_q_lock);
1879 if (zfcp_qdio_sbal_get(qdio))
1880 goto out;
1881
1882 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1883 SBAL_SFLAGS0_TYPE_READ,
1884 adapter->pool.erp_req);
1885
1886 if (IS_ERR(req)) {
1887 retval = PTR_ERR(req);
1888 goto out;
1889 }
1890
1891 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1892 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1893
1894 req->qtcb->header.port_handle = erp_action->port->handle;
1895 req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1896 req->handler = zfcp_fsf_open_lun_handler;
1897 req->data = erp_action->sdev;
1898 req->erp_action = erp_action;
1899 erp_action->fsf_req_id = req->req_id;
1900
1901 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1902 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1903
1904 zfcp_fsf_start_erp_timer(req);
1905 retval = zfcp_fsf_req_send(req);
1906 if (retval) {
1907 zfcp_fsf_req_free(req);
1908 erp_action->fsf_req_id = 0;
1909 }
1910 out:
1911 spin_unlock_irq(&qdio->req_q_lock);
1912 return retval;
1913 }
1914
1915 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1916 {
1917 struct scsi_device *sdev = req->data;
1918 struct zfcp_scsi_dev *zfcp_sdev;
1919
1920 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1921 return;
1922
1923 zfcp_sdev = sdev_to_zfcp(sdev);
1924
1925 switch (req->qtcb->header.fsf_status) {
1926 case FSF_PORT_HANDLE_NOT_VALID:
1927 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
1928 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1929 break;
1930 case FSF_LUN_HANDLE_NOT_VALID:
1931 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
1932 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1933 break;
1934 case FSF_PORT_BOXED:
1935 zfcp_erp_set_port_status(zfcp_sdev->port,
1936 ZFCP_STATUS_COMMON_ACCESS_BOXED);
1937 zfcp_erp_port_reopen(zfcp_sdev->port,
1938 ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
1939 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1940 break;
1941 case FSF_ADAPTER_STATUS_AVAILABLE:
1942 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1943 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1944 zfcp_fc_test_link(zfcp_sdev->port);
1945 /* fall through */
1946 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1947 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1948 break;
1949 }
1950 break;
1951 case FSF_GOOD:
1952 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1953 break;
1954 }
1955 }
1956
1957 /**
1958 * zfcp_fsf_close_LUN - close LUN
1959 * @erp_action: pointer to erp_action triggering the "close LUN"
1960 * Returns: 0 on success, error otherwise
1961 */
1962 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
1963 {
1964 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1965 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1966 struct zfcp_fsf_req *req;
1967 int retval = -EIO;
1968
1969 spin_lock_irq(&qdio->req_q_lock);
1970 if (zfcp_qdio_sbal_get(qdio))
1971 goto out;
1972
1973 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1974 SBAL_SFLAGS0_TYPE_READ,
1975 qdio->adapter->pool.erp_req);
1976
1977 if (IS_ERR(req)) {
1978 retval = PTR_ERR(req);
1979 goto out;
1980 }
1981
1982 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1983 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1984
1985 req->qtcb->header.port_handle = erp_action->port->handle;
1986 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1987 req->handler = zfcp_fsf_close_lun_handler;
1988 req->data = erp_action->sdev;
1989 req->erp_action = erp_action;
1990 erp_action->fsf_req_id = req->req_id;
1991
1992 zfcp_fsf_start_erp_timer(req);
1993 retval = zfcp_fsf_req_send(req);
1994 if (retval) {
1995 zfcp_fsf_req_free(req);
1996 erp_action->fsf_req_id = 0;
1997 }
1998 out:
1999 spin_unlock_irq(&qdio->req_q_lock);
2000 return retval;
2001 }
2002
2003 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2004 {
2005 lat_rec->sum += lat;
2006 lat_rec->min = min(lat_rec->min, lat);
2007 lat_rec->max = max(lat_rec->max, lat);
2008 }
2009
2010 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
2011 {
2012 struct fsf_qual_latency_info *lat_in;
2013 struct latency_cont *lat = NULL;
2014 struct zfcp_scsi_dev *zfcp_sdev;
2015 struct zfcp_blk_drv_data blktrc;
2016 int ticks = req->adapter->timer_ticks;
2017
2018 lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
2019
2020 blktrc.flags = 0;
2021 blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2022 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2023 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2024 blktrc.inb_usage = 0;
2025 blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
2026
2027 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
2028 !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2029 zfcp_sdev = sdev_to_zfcp(scsi->device);
2030 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2031 blktrc.channel_lat = lat_in->channel_lat * ticks;
2032 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2033
2034 switch (req->qtcb->bottom.io.data_direction) {
2035 case FSF_DATADIR_DIF_READ_STRIP:
2036 case FSF_DATADIR_DIF_READ_CONVERT:
2037 case FSF_DATADIR_READ:
2038 lat = &zfcp_sdev->latencies.read;
2039 break;
2040 case FSF_DATADIR_DIF_WRITE_INSERT:
2041 case FSF_DATADIR_DIF_WRITE_CONVERT:
2042 case FSF_DATADIR_WRITE:
2043 lat = &zfcp_sdev->latencies.write;
2044 break;
2045 case FSF_DATADIR_CMND:
2046 lat = &zfcp_sdev->latencies.cmd;
2047 break;
2048 }
2049
2050 if (lat) {
2051 spin_lock(&zfcp_sdev->latencies.lock);
2052 zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2053 zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2054 lat->counter++;
2055 spin_unlock(&zfcp_sdev->latencies.lock);
2056 }
2057 }
2058
2059 blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2060 sizeof(blktrc));
2061 }
2062
2063 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
2064 {
2065 struct scsi_cmnd *scmnd = req->data;
2066 struct scsi_device *sdev = scmnd->device;
2067 struct zfcp_scsi_dev *zfcp_sdev;
2068 struct fsf_qtcb_header *header = &req->qtcb->header;
2069
2070 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2071 return;
2072
2073 zfcp_sdev = sdev_to_zfcp(sdev);
2074
2075 switch (header->fsf_status) {
2076 case FSF_HANDLE_MISMATCH:
2077 case FSF_PORT_HANDLE_NOT_VALID:
2078 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1");
2079 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2080 break;
2081 case FSF_FCPLUN_NOT_VALID:
2082 case FSF_LUN_HANDLE_NOT_VALID:
2083 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2084 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2085 break;
2086 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2087 zfcp_fsf_class_not_supp(req);
2088 break;
2089 case FSF_ACCESS_DENIED:
2090 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
2091 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2092 break;
2093 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2094 dev_err(&req->adapter->ccw_device->dev,
2095 "Incorrect direction %d, LUN 0x%016Lx on port "
2096 "0x%016Lx closed\n",
2097 req->qtcb->bottom.io.data_direction,
2098 (unsigned long long)zfcp_scsi_dev_lun(sdev),
2099 (unsigned long long)zfcp_sdev->port->wwpn);
2100 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2101 "fssfch3");
2102 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2103 break;
2104 case FSF_CMND_LENGTH_NOT_VALID:
2105 dev_err(&req->adapter->ccw_device->dev,
2106 "Incorrect CDB length %d, LUN 0x%016Lx on "
2107 "port 0x%016Lx closed\n",
2108 req->qtcb->bottom.io.fcp_cmnd_length,
2109 (unsigned long long)zfcp_scsi_dev_lun(sdev),
2110 (unsigned long long)zfcp_sdev->port->wwpn);
2111 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2112 "fssfch4");
2113 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2114 break;
2115 case FSF_PORT_BOXED:
2116 zfcp_erp_set_port_status(zfcp_sdev->port,
2117 ZFCP_STATUS_COMMON_ACCESS_BOXED);
2118 zfcp_erp_port_reopen(zfcp_sdev->port,
2119 ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2120 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2121 break;
2122 case FSF_LUN_BOXED:
2123 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2124 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2125 "fssfch6");
2126 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2127 break;
2128 case FSF_ADAPTER_STATUS_AVAILABLE:
2129 if (header->fsf_status_qual.word[0] ==
2130 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2131 zfcp_fc_test_link(zfcp_sdev->port);
2132 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2133 break;
2134 }
2135 }
2136
2137 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2138 {
2139 struct scsi_cmnd *scpnt;
2140 struct fcp_resp_with_ext *fcp_rsp;
2141 unsigned long flags;
2142
2143 read_lock_irqsave(&req->adapter->abort_lock, flags);
2144
2145 scpnt = req->data;
2146 if (unlikely(!scpnt)) {
2147 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2148 return;
2149 }
2150
2151 zfcp_fsf_fcp_handler_common(req);
2152
2153 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2154 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2155 goto skip_fsfstatus;
2156 }
2157
2158 switch (req->qtcb->header.fsf_status) {
2159 case FSF_INCONSISTENT_PROT_DATA:
2160 case FSF_INVALID_PROT_PARM:
2161 set_host_byte(scpnt, DID_ERROR);
2162 goto skip_fsfstatus;
2163 case FSF_BLOCK_GUARD_CHECK_FAILURE:
2164 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2165 goto skip_fsfstatus;
2166 case FSF_APP_TAG_CHECK_FAILURE:
2167 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2168 goto skip_fsfstatus;
2169 case FSF_REF_TAG_CHECK_FAILURE:
2170 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2171 goto skip_fsfstatus;
2172 }
2173 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2174 zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2175
2176 skip_fsfstatus:
2177 zfcp_fsf_req_trace(req, scpnt);
2178 zfcp_dbf_scsi_result(scpnt, req);
2179
2180 scpnt->host_scribble = NULL;
2181 (scpnt->scsi_done) (scpnt);
2182 /*
2183 * We must hold this lock until scsi_done has been called.
2184 * Otherwise we may call scsi_done after abort regarding this
2185 * command has completed.
2186 * Note: scsi_done must not block!
2187 */
2188 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2189 }
2190
2191 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2192 {
2193 switch (scsi_get_prot_op(scsi_cmnd)) {
2194 case SCSI_PROT_NORMAL:
2195 switch (scsi_cmnd->sc_data_direction) {
2196 case DMA_NONE:
2197 *data_dir = FSF_DATADIR_CMND;
2198 break;
2199 case DMA_FROM_DEVICE:
2200 *data_dir = FSF_DATADIR_READ;
2201 break;
2202 case DMA_TO_DEVICE:
2203 *data_dir = FSF_DATADIR_WRITE;
2204 break;
2205 case DMA_BIDIRECTIONAL:
2206 return -EINVAL;
2207 }
2208 break;
2209
2210 case SCSI_PROT_READ_STRIP:
2211 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2212 break;
2213 case SCSI_PROT_WRITE_INSERT:
2214 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2215 break;
2216 case SCSI_PROT_READ_PASS:
2217 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2218 break;
2219 case SCSI_PROT_WRITE_PASS:
2220 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2221 break;
2222 default:
2223 return -EINVAL;
2224 }
2225
2226 return 0;
2227 }
2228
2229 /**
2230 * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2231 * @scsi_cmnd: scsi command to be sent
2232 */
2233 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2234 {
2235 struct zfcp_fsf_req *req;
2236 struct fcp_cmnd *fcp_cmnd;
2237 u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
2238 int retval = -EIO;
2239 struct scsi_device *sdev = scsi_cmnd->device;
2240 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2241 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2242 struct zfcp_qdio *qdio = adapter->qdio;
2243 struct fsf_qtcb_bottom_io *io;
2244 unsigned long flags;
2245
2246 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2247 ZFCP_STATUS_COMMON_UNBLOCKED)))
2248 return -EBUSY;
2249
2250 spin_lock_irqsave(&qdio->req_q_lock, flags);
2251 if (atomic_read(&qdio->req_q_free) <= 0) {
2252 atomic_inc(&qdio->req_q_full);
2253 goto out;
2254 }
2255
2256 if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2257 sbtype = SBAL_SFLAGS0_TYPE_WRITE;
2258
2259 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2260 sbtype, adapter->pool.scsi_req);
2261
2262 if (IS_ERR(req)) {
2263 retval = PTR_ERR(req);
2264 goto out;
2265 }
2266
2267 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2268
2269 io = &req->qtcb->bottom.io;
2270 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2271 req->data = scsi_cmnd;
2272 req->handler = zfcp_fsf_fcp_cmnd_handler;
2273 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2274 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2275 io->service_class = FSF_CLASS_3;
2276 io->fcp_cmnd_length = FCP_CMND_LEN;
2277
2278 if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2279 io->data_block_length = scsi_cmnd->device->sector_size;
2280 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2281 }
2282
2283 if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction))
2284 goto failed_scsi_cmnd;
2285
2286 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2287 zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd, 0);
2288
2289 if (scsi_prot_sg_count(scsi_cmnd)) {
2290 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2291 scsi_prot_sg_count(scsi_cmnd));
2292 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2293 scsi_prot_sglist(scsi_cmnd));
2294 if (retval)
2295 goto failed_scsi_cmnd;
2296 io->prot_data_length = zfcp_qdio_real_bytes(
2297 scsi_prot_sglist(scsi_cmnd));
2298 }
2299
2300 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2301 scsi_sglist(scsi_cmnd));
2302 if (unlikely(retval))
2303 goto failed_scsi_cmnd;
2304
2305 zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2306 if (zfcp_adapter_multi_buffer_active(adapter))
2307 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2308
2309 retval = zfcp_fsf_req_send(req);
2310 if (unlikely(retval))
2311 goto failed_scsi_cmnd;
2312
2313 goto out;
2314
2315 failed_scsi_cmnd:
2316 zfcp_fsf_req_free(req);
2317 scsi_cmnd->host_scribble = NULL;
2318 out:
2319 spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2320 return retval;
2321 }
2322
2323 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2324 {
2325 struct fcp_resp_with_ext *fcp_rsp;
2326 struct fcp_resp_rsp_info *rsp_info;
2327
2328 zfcp_fsf_fcp_handler_common(req);
2329
2330 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2331 rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2332
2333 if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2334 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2335 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2336 }
2337
2338 /**
2339 * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
2340 * @scmnd: SCSI command to send the task management command for
2341 * @tm_flags: unsigned byte for task management flags
2342 * Returns: on success pointer to struct fsf_req, NULL otherwise
2343 */
2344 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
2345 u8 tm_flags)
2346 {
2347 struct zfcp_fsf_req *req = NULL;
2348 struct fcp_cmnd *fcp_cmnd;
2349 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
2350 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2351
2352 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2353 ZFCP_STATUS_COMMON_UNBLOCKED)))
2354 return NULL;
2355
2356 spin_lock_irq(&qdio->req_q_lock);
2357 if (zfcp_qdio_sbal_get(qdio))
2358 goto out;
2359
2360 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2361 SBAL_SFLAGS0_TYPE_WRITE,
2362 qdio->adapter->pool.scsi_req);
2363
2364 if (IS_ERR(req)) {
2365 req = NULL;
2366 goto out;
2367 }
2368
2369 req->data = scmnd;
2370 req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2371 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2372 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2373 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2374 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2375 req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2376
2377 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2378
2379 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2380 zfcp_fc_scsi_to_fcp(fcp_cmnd, scmnd, tm_flags);
2381
2382 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2383 if (!zfcp_fsf_req_send(req))
2384 goto out;
2385
2386 zfcp_fsf_req_free(req);
2387 req = NULL;
2388 out:
2389 spin_unlock_irq(&qdio->req_q_lock);
2390 return req;
2391 }
2392
2393 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2394 {
2395 }
2396
2397 /**
2398 * zfcp_fsf_control_file - control file upload/download
2399 * @adapter: pointer to struct zfcp_adapter
2400 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2401 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2402 */
2403 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2404 struct zfcp_fsf_cfdc *fsf_cfdc)
2405 {
2406 struct zfcp_qdio *qdio = adapter->qdio;
2407 struct zfcp_fsf_req *req = NULL;
2408 struct fsf_qtcb_bottom_support *bottom;
2409 int retval = -EIO;
2410 u8 direction;
2411
2412 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2413 return ERR_PTR(-EOPNOTSUPP);
2414
2415 switch (fsf_cfdc->command) {
2416 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2417 direction = SBAL_SFLAGS0_TYPE_WRITE;
2418 break;
2419 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2420 direction = SBAL_SFLAGS0_TYPE_READ;
2421 break;
2422 default:
2423 return ERR_PTR(-EINVAL);
2424 }
2425
2426 spin_lock_irq(&qdio->req_q_lock);
2427 if (zfcp_qdio_sbal_get(qdio))
2428 goto out;
2429
2430 req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, direction, NULL);
2431 if (IS_ERR(req)) {
2432 retval = -EPERM;
2433 goto out;
2434 }
2435
2436 req->handler = zfcp_fsf_control_file_handler;
2437
2438 bottom = &req->qtcb->bottom.support;
2439 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2440 bottom->option = fsf_cfdc->option;
2441
2442 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, fsf_cfdc->sg);
2443
2444 if (retval ||
2445 (zfcp_qdio_real_bytes(fsf_cfdc->sg) != ZFCP_CFDC_MAX_SIZE)) {
2446 zfcp_fsf_req_free(req);
2447 retval = -EIO;
2448 goto out;
2449 }
2450 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2451 if (zfcp_adapter_multi_buffer_active(adapter))
2452 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2453
2454 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2455 retval = zfcp_fsf_req_send(req);
2456 out:
2457 spin_unlock_irq(&qdio->req_q_lock);
2458
2459 if (!retval) {
2460 wait_for_completion(&req->completion);
2461 return req;
2462 }
2463 return ERR_PTR(retval);
2464 }
2465
2466 /**
2467 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2468 * @adapter: pointer to struct zfcp_adapter
2469 * @sbal_idx: response queue index of SBAL to be processed
2470 */
2471 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2472 {
2473 struct zfcp_adapter *adapter = qdio->adapter;
2474 struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2475 struct qdio_buffer_element *sbale;
2476 struct zfcp_fsf_req *fsf_req;
2477 unsigned long req_id;
2478 int idx;
2479
2480 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2481
2482 sbale = &sbal->element[idx];
2483 req_id = (unsigned long) sbale->addr;
2484 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2485
2486 if (!fsf_req) {
2487 /*
2488 * Unknown request means that we have potentially memory
2489 * corruption and must stop the machine immediately.
2490 */
2491 zfcp_qdio_siosl(adapter);
2492 panic("error: unknown req_id (%lx) on adapter %s.\n",
2493 req_id, dev_name(&adapter->ccw_device->dev));
2494 }
2495
2496 fsf_req->qdio_req.sbal_response = sbal_idx;
2497 zfcp_fsf_req_complete(fsf_req);
2498
2499 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
2500 break;
2501 }
2502 }
2503
2504 struct zfcp_fsf_req *zfcp_fsf_get_req(struct zfcp_qdio *qdio,
2505 struct qdio_buffer *sbal)
2506 {
2507 struct qdio_buffer_element *sbale = &sbal->element[0];
2508 u64 req_id = (unsigned long) sbale->addr;
2509
2510 return zfcp_reqlist_find(qdio->adapter->req_list, req_id);
2511 }
kernel source for telekom puls (alcatel/mediatek)