]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/s390/scsi/zfcp_fsf.c
projects / mirror_ubuntu-bionic-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
scsi: zfcp: use endianness conversions with common FC(P) struct fields
[mirror_ubuntu-bionic-kernel.git] / drivers / s390 / scsi / zfcp_fsf.c
1 /*
2 * zfcp device driver
3 *
4 * Implementation of FSF commands.
5 *
6 * Copyright IBM Corp. 2002, 2017
7 */
8
9 #define KMSG_COMPONENT "zfcp"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
12 #include <linux/blktrace_api.h>
13 #include <linux/slab.h>
14 #include <scsi/fc/fc_els.h>
15 #include "zfcp_ext.h"
16 #include "zfcp_fc.h"
17 #include "zfcp_dbf.h"
18 #include "zfcp_qdio.h"
19 #include "zfcp_reqlist.h"
20
21 struct kmem_cache *zfcp_fsf_qtcb_cache;
22
23 static void zfcp_fsf_request_timeout_handler(unsigned long data)
24 {
25 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
26 zfcp_qdio_siosl(adapter);
27 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
28 "fsrth_1");
29 }
30
31 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
32 unsigned long timeout)
33 {
34 fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
35 fsf_req->timer.data = (unsigned long) fsf_req->adapter;
36 fsf_req->timer.expires = jiffies + timeout;
37 add_timer(&fsf_req->timer);
38 }
39
40 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
41 {
42 BUG_ON(!fsf_req->erp_action);
43 fsf_req->timer.function = zfcp_erp_timeout_handler;
44 fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
45 fsf_req->timer.expires = jiffies + 30 * HZ;
46 add_timer(&fsf_req->timer);
47 }
48
49 /* association between FSF command and FSF QTCB type */
50 static u32 fsf_qtcb_type[] = {
51 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
52 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
53 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
54 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
55 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
56 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
57 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
58 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
59 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
60 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
61 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
62 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
63 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
64 };
65
66 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
67 {
68 dev_err(&req->adapter->ccw_device->dev, "FCP device not "
69 "operational because of an unsupported FC class\n");
70 zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1");
71 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
72 }
73
74 /**
75 * zfcp_fsf_req_free - free memory used by fsf request
76 * @fsf_req: pointer to struct zfcp_fsf_req
77 */
78 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
79 {
80 if (likely(req->pool)) {
81 if (likely(req->qtcb))
82 mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
83 mempool_free(req, req->pool);
84 return;
85 }
86
87 if (likely(req->qtcb))
88 kmem_cache_free(zfcp_fsf_qtcb_cache, req->qtcb);
89 kfree(req);
90 }
91
92 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
93 {
94 unsigned long flags;
95 struct fsf_status_read_buffer *sr_buf = req->data;
96 struct zfcp_adapter *adapter = req->adapter;
97 struct zfcp_port *port;
98 int d_id = ntoh24(sr_buf->d_id);
99
100 read_lock_irqsave(&adapter->port_list_lock, flags);
101 list_for_each_entry(port, &adapter->port_list, list)
102 if (port->d_id == d_id) {
103 zfcp_erp_port_reopen(port, 0, "fssrpc1");
104 break;
105 }
106 read_unlock_irqrestore(&adapter->port_list_lock, flags);
107 }
108
109 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req,
110 struct fsf_link_down_info *link_down)
111 {
112 struct zfcp_adapter *adapter = req->adapter;
113
114 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
115 return;
116
117 atomic_or(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
118
119 zfcp_scsi_schedule_rports_block(adapter);
120
121 if (!link_down)
122 goto out;
123
124 switch (link_down->error_code) {
125 case FSF_PSQ_LINK_NO_LIGHT:
126 dev_warn(&req->adapter->ccw_device->dev,
127 "There is no light signal from the local "
128 "fibre channel cable\n");
129 break;
130 case FSF_PSQ_LINK_WRAP_PLUG:
131 dev_warn(&req->adapter->ccw_device->dev,
132 "There is a wrap plug instead of a fibre "
133 "channel cable\n");
134 break;
135 case FSF_PSQ_LINK_NO_FCP:
136 dev_warn(&req->adapter->ccw_device->dev,
137 "The adjacent fibre channel node does not "
138 "support FCP\n");
139 break;
140 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
141 dev_warn(&req->adapter->ccw_device->dev,
142 "The FCP device is suspended because of a "
143 "firmware update\n");
144 break;
145 case FSF_PSQ_LINK_INVALID_WWPN:
146 dev_warn(&req->adapter->ccw_device->dev,
147 "The FCP device detected a WWPN that is "
148 "duplicate or not valid\n");
149 break;
150 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
151 dev_warn(&req->adapter->ccw_device->dev,
152 "The fibre channel fabric does not support NPIV\n");
153 break;
154 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
155 dev_warn(&req->adapter->ccw_device->dev,
156 "The FCP adapter cannot support more NPIV ports\n");
157 break;
158 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
159 dev_warn(&req->adapter->ccw_device->dev,
160 "The adjacent switch cannot support "
161 "more NPIV ports\n");
162 break;
163 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
164 dev_warn(&req->adapter->ccw_device->dev,
165 "The FCP adapter could not log in to the "
166 "fibre channel fabric\n");
167 break;
168 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
169 dev_warn(&req->adapter->ccw_device->dev,
170 "The WWPN assignment file on the FCP adapter "
171 "has been damaged\n");
172 break;
173 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
174 dev_warn(&req->adapter->ccw_device->dev,
175 "The mode table on the FCP adapter "
176 "has been damaged\n");
177 break;
178 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
179 dev_warn(&req->adapter->ccw_device->dev,
180 "All NPIV ports on the FCP adapter have "
181 "been assigned\n");
182 break;
183 default:
184 dev_warn(&req->adapter->ccw_device->dev,
185 "The link between the FCP adapter and "
186 "the FC fabric is down\n");
187 }
188 out:
189 zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
190 }
191
192 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
193 {
194 struct fsf_status_read_buffer *sr_buf = req->data;
195 struct fsf_link_down_info *ldi =
196 (struct fsf_link_down_info *) &sr_buf->payload;
197
198 switch (sr_buf->status_subtype) {
199 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
200 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_or(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) = be64_to_cpu(nsp->fl_wwpn);
480 fc_host_node_name(shost) = be64_to_cpu(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 = be64_to_cpu(plogi->fl_wwpn);
507 adapter->peer_wwnn = be64_to_cpu(plogi->fl_wwnn);
508 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
509 break;
510 case FSF_TOPO_FABRIC:
511 if (bottom->connection_features & FSF_FEATURE_NPIV_MODE)
512 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
513 else
514 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
515 break;
516 case FSF_TOPO_AL:
517 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
518 /* fall through */
519 default:
520 dev_err(&adapter->ccw_device->dev,
521 "Unknown or unsupported arbitrated loop "
522 "fibre channel topology detected\n");
523 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1");
524 return -EIO;
525 }
526
527 return 0;
528 }
529
530 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
531 {
532 struct zfcp_adapter *adapter = req->adapter;
533 struct fsf_qtcb *qtcb = req->qtcb;
534 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
535 struct Scsi_Host *shost = adapter->scsi_host;
536
537 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
538 return;
539
540 adapter->fsf_lic_version = bottom->lic_version;
541 adapter->adapter_features = bottom->adapter_features;
542 adapter->connection_features = bottom->connection_features;
543 adapter->peer_wwpn = 0;
544 adapter->peer_wwnn = 0;
545 adapter->peer_d_id = 0;
546
547 switch (qtcb->header.fsf_status) {
548 case FSF_GOOD:
549 if (zfcp_fsf_exchange_config_evaluate(req))
550 return;
551
552 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
553 dev_err(&adapter->ccw_device->dev,
554 "FCP adapter maximum QTCB size (%d bytes) "
555 "is too small\n",
556 bottom->max_qtcb_size);
557 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1");
558 return;
559 }
560 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
561 &adapter->status);
562 break;
563 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
564 fc_host_node_name(shost) = 0;
565 fc_host_port_name(shost) = 0;
566 fc_host_port_id(shost) = 0;
567 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
568 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
569 adapter->hydra_version = 0;
570
571 /* avoids adapter shutdown to be able to recognize
572 * events such as LINK UP */
573 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
574 &adapter->status);
575 zfcp_fsf_link_down_info_eval(req,
576 &qtcb->header.fsf_status_qual.link_down_info);
577 if (zfcp_fsf_exchange_config_evaluate(req))
578 return;
579 break;
580 default:
581 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
582 return;
583 }
584
585 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
586 adapter->hardware_version = bottom->hardware_version;
587 memcpy(fc_host_serial_number(shost), bottom->serial_number,
588 min(FC_SERIAL_NUMBER_SIZE, 17));
589 EBCASC(fc_host_serial_number(shost),
590 min(FC_SERIAL_NUMBER_SIZE, 17));
591 }
592
593 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
594 dev_err(&adapter->ccw_device->dev,
595 "The FCP adapter only supports newer "
596 "control block versions\n");
597 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4");
598 return;
599 }
600 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
601 dev_err(&adapter->ccw_device->dev,
602 "The FCP adapter only supports older "
603 "control block versions\n");
604 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5");
605 }
606 }
607
608 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
609 {
610 struct zfcp_adapter *adapter = req->adapter;
611 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
612 struct Scsi_Host *shost = adapter->scsi_host;
613
614 if (req->data)
615 memcpy(req->data, bottom, sizeof(*bottom));
616
617 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
618 fc_host_permanent_port_name(shost) = bottom->wwpn;
619 } else
620 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
621 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
622 fc_host_supported_speeds(shost) =
623 zfcp_fsf_convert_portspeed(bottom->supported_speed);
624 memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
625 FC_FC4_LIST_SIZE);
626 memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
627 FC_FC4_LIST_SIZE);
628 }
629
630 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
631 {
632 struct fsf_qtcb *qtcb = req->qtcb;
633
634 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
635 return;
636
637 switch (qtcb->header.fsf_status) {
638 case FSF_GOOD:
639 zfcp_fsf_exchange_port_evaluate(req);
640 break;
641 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
642 zfcp_fsf_exchange_port_evaluate(req);
643 zfcp_fsf_link_down_info_eval(req,
644 &qtcb->header.fsf_status_qual.link_down_info);
645 break;
646 }
647 }
648
649 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
650 {
651 struct zfcp_fsf_req *req;
652
653 if (likely(pool))
654 req = mempool_alloc(pool, GFP_ATOMIC);
655 else
656 req = kmalloc(sizeof(*req), GFP_ATOMIC);
657
658 if (unlikely(!req))
659 return NULL;
660
661 memset(req, 0, sizeof(*req));
662 req->pool = pool;
663 return req;
664 }
665
666 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
667 {
668 struct fsf_qtcb *qtcb;
669
670 if (likely(pool))
671 qtcb = mempool_alloc(pool, GFP_ATOMIC);
672 else
673 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
674
675 if (unlikely(!qtcb))
676 return NULL;
677
678 memset(qtcb, 0, sizeof(*qtcb));
679 return qtcb;
680 }
681
682 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
683 u32 fsf_cmd, u8 sbtype,
684 mempool_t *pool)
685 {
686 struct zfcp_adapter *adapter = qdio->adapter;
687 struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
688
689 if (unlikely(!req))
690 return ERR_PTR(-ENOMEM);
691
692 if (adapter->req_no == 0)
693 adapter->req_no++;
694
695 INIT_LIST_HEAD(&req->list);
696 init_timer(&req->timer);
697 init_completion(&req->completion);
698
699 req->adapter = adapter;
700 req->fsf_command = fsf_cmd;
701 req->req_id = adapter->req_no;
702
703 if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
704 if (likely(pool))
705 req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
706 else
707 req->qtcb = zfcp_qtcb_alloc(NULL);
708
709 if (unlikely(!req->qtcb)) {
710 zfcp_fsf_req_free(req);
711 return ERR_PTR(-ENOMEM);
712 }
713
714 req->seq_no = adapter->fsf_req_seq_no;
715 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
716 req->qtcb->prefix.req_id = req->req_id;
717 req->qtcb->prefix.ulp_info = 26;
718 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
719 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
720 req->qtcb->header.req_handle = req->req_id;
721 req->qtcb->header.fsf_command = req->fsf_command;
722 }
723
724 zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
725 req->qtcb, sizeof(struct fsf_qtcb));
726
727 return req;
728 }
729
730 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
731 {
732 struct zfcp_adapter *adapter = req->adapter;
733 struct zfcp_qdio *qdio = adapter->qdio;
734 int with_qtcb = (req->qtcb != NULL);
735 int req_id = req->req_id;
736
737 zfcp_reqlist_add(adapter->req_list, req);
738
739 req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
740 req->issued = get_tod_clock();
741 if (zfcp_qdio_send(qdio, &req->qdio_req)) {
742 del_timer(&req->timer);
743 /* lookup request again, list might have changed */
744 zfcp_reqlist_find_rm(adapter->req_list, req_id);
745 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
746 return -EIO;
747 }
748
749 /* Don't increase for unsolicited status */
750 if (with_qtcb)
751 adapter->fsf_req_seq_no++;
752 adapter->req_no++;
753
754 return 0;
755 }
756
757 /**
758 * zfcp_fsf_status_read - send status read request
759 * @adapter: pointer to struct zfcp_adapter
760 * @req_flags: request flags
761 * Returns: 0 on success, ERROR otherwise
762 */
763 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
764 {
765 struct zfcp_adapter *adapter = qdio->adapter;
766 struct zfcp_fsf_req *req;
767 struct fsf_status_read_buffer *sr_buf;
768 struct page *page;
769 int retval = -EIO;
770
771 spin_lock_irq(&qdio->req_q_lock);
772 if (zfcp_qdio_sbal_get(qdio))
773 goto out;
774
775 req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
776 SBAL_SFLAGS0_TYPE_STATUS,
777 adapter->pool.status_read_req);
778 if (IS_ERR(req)) {
779 retval = PTR_ERR(req);
780 goto out;
781 }
782
783 page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
784 if (!page) {
785 retval = -ENOMEM;
786 goto failed_buf;
787 }
788 sr_buf = page_address(page);
789 memset(sr_buf, 0, sizeof(*sr_buf));
790 req->data = sr_buf;
791
792 zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
793 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
794
795 retval = zfcp_fsf_req_send(req);
796 if (retval)
797 goto failed_req_send;
798
799 goto out;
800
801 failed_req_send:
802 req->data = NULL;
803 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
804 failed_buf:
805 zfcp_dbf_hba_fsf_uss("fssr__1", req);
806 zfcp_fsf_req_free(req);
807 out:
808 spin_unlock_irq(&qdio->req_q_lock);
809 return retval;
810 }
811
812 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
813 {
814 struct scsi_device *sdev = req->data;
815 struct zfcp_scsi_dev *zfcp_sdev;
816 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
817
818 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
819 return;
820
821 zfcp_sdev = sdev_to_zfcp(sdev);
822
823 switch (req->qtcb->header.fsf_status) {
824 case FSF_PORT_HANDLE_NOT_VALID:
825 if (fsq->word[0] == fsq->word[1]) {
826 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
827 "fsafch1");
828 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
829 }
830 break;
831 case FSF_LUN_HANDLE_NOT_VALID:
832 if (fsq->word[0] == fsq->word[1]) {
833 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
834 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
835 }
836 break;
837 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
838 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
839 break;
840 case FSF_PORT_BOXED:
841 zfcp_erp_set_port_status(zfcp_sdev->port,
842 ZFCP_STATUS_COMMON_ACCESS_BOXED);
843 zfcp_erp_port_reopen(zfcp_sdev->port,
844 ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
845 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
846 break;
847 case FSF_LUN_BOXED:
848 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
849 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
850 "fsafch4");
851 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
852 break;
853 case FSF_ADAPTER_STATUS_AVAILABLE:
854 switch (fsq->word[0]) {
855 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
856 zfcp_fc_test_link(zfcp_sdev->port);
857 /* fall through */
858 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
859 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
860 break;
861 }
862 break;
863 case FSF_GOOD:
864 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
865 break;
866 }
867 }
868
869 /**
870 * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
871 * @scmnd: The SCSI command to abort
872 * Returns: pointer to struct zfcp_fsf_req
873 */
874
875 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
876 {
877 struct zfcp_fsf_req *req = NULL;
878 struct scsi_device *sdev = scmnd->device;
879 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
880 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
881 unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
882
883 spin_lock_irq(&qdio->req_q_lock);
884 if (zfcp_qdio_sbal_get(qdio))
885 goto out;
886 req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
887 SBAL_SFLAGS0_TYPE_READ,
888 qdio->adapter->pool.scsi_abort);
889 if (IS_ERR(req)) {
890 req = NULL;
891 goto out;
892 }
893
894 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
895 ZFCP_STATUS_COMMON_UNBLOCKED)))
896 goto out_error_free;
897
898 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
899
900 req->data = sdev;
901 req->handler = zfcp_fsf_abort_fcp_command_handler;
902 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
903 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
904 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
905
906 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
907 if (!zfcp_fsf_req_send(req))
908 goto out;
909
910 out_error_free:
911 zfcp_fsf_req_free(req);
912 req = NULL;
913 out:
914 spin_unlock_irq(&qdio->req_q_lock);
915 return req;
916 }
917
918 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
919 {
920 struct zfcp_adapter *adapter = req->adapter;
921 struct zfcp_fsf_ct_els *ct = req->data;
922 struct fsf_qtcb_header *header = &req->qtcb->header;
923
924 ct->status = -EINVAL;
925
926 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
927 goto skip_fsfstatus;
928
929 switch (header->fsf_status) {
930 case FSF_GOOD:
931 ct->status = 0;
932 zfcp_dbf_san_res("fsscth2", req);
933 break;
934 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
935 zfcp_fsf_class_not_supp(req);
936 break;
937 case FSF_ADAPTER_STATUS_AVAILABLE:
938 switch (header->fsf_status_qual.word[0]){
939 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
940 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
941 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
942 break;
943 }
944 break;
945 case FSF_PORT_BOXED:
946 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
947 break;
948 case FSF_PORT_HANDLE_NOT_VALID:
949 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
950 /* fall through */
951 case FSF_GENERIC_COMMAND_REJECTED:
952 case FSF_PAYLOAD_SIZE_MISMATCH:
953 case FSF_REQUEST_SIZE_TOO_LARGE:
954 case FSF_RESPONSE_SIZE_TOO_LARGE:
955 case FSF_SBAL_MISMATCH:
956 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
957 break;
958 }
959
960 skip_fsfstatus:
961 if (ct->handler)
962 ct->handler(ct->handler_data);
963 }
964
965 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
966 struct zfcp_qdio_req *q_req,
967 struct scatterlist *sg_req,
968 struct scatterlist *sg_resp)
969 {
970 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
971 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
972 zfcp_qdio_set_sbale_last(qdio, q_req);
973 }
974
975 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
976 struct scatterlist *sg_req,
977 struct scatterlist *sg_resp)
978 {
979 struct zfcp_adapter *adapter = req->adapter;
980 struct zfcp_qdio *qdio = adapter->qdio;
981 struct fsf_qtcb *qtcb = req->qtcb;
982 u32 feat = adapter->adapter_features;
983
984 if (zfcp_adapter_multi_buffer_active(adapter)) {
985 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
986 return -EIO;
987 qtcb->bottom.support.req_buf_length =
988 zfcp_qdio_real_bytes(sg_req);
989 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
990 return -EIO;
991 qtcb->bottom.support.resp_buf_length =
992 zfcp_qdio_real_bytes(sg_resp);
993
994 zfcp_qdio_set_data_div(qdio, &req->qdio_req, sg_nents(sg_req));
995 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
996 zfcp_qdio_set_scount(qdio, &req->qdio_req);
997 return 0;
998 }
999
1000 /* use single, unchained SBAL if it can hold the request */
1001 if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
1002 zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req,
1003 sg_req, sg_resp);
1004 return 0;
1005 }
1006
1007 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS))
1008 return -EOPNOTSUPP;
1009
1010 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
1011 return -EIO;
1012
1013 qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req);
1014
1015 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1016 zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req);
1017
1018 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
1019 return -EIO;
1020
1021 qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp);
1022
1023 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1024
1025 return 0;
1026 }
1027
1028 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1029 struct scatterlist *sg_req,
1030 struct scatterlist *sg_resp,
1031 unsigned int timeout)
1032 {
1033 int ret;
1034
1035 ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
1036 if (ret)
1037 return ret;
1038
1039 /* common settings for ct/gs and els requests */
1040 if (timeout > 255)
1041 timeout = 255; /* max value accepted by hardware */
1042 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1043 req->qtcb->bottom.support.timeout = timeout;
1044 zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1045
1046 return 0;
1047 }
1048
1049 /**
1050 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1051 * @ct: pointer to struct zfcp_send_ct with data for request
1052 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1053 */
1054 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1055 struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1056 unsigned int timeout)
1057 {
1058 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1059 struct zfcp_fsf_req *req;
1060 int ret = -EIO;
1061
1062 spin_lock_irq(&qdio->req_q_lock);
1063 if (zfcp_qdio_sbal_get(qdio))
1064 goto out;
1065
1066 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1067 SBAL_SFLAGS0_TYPE_WRITE_READ, pool);
1068
1069 if (IS_ERR(req)) {
1070 ret = PTR_ERR(req);
1071 goto out;
1072 }
1073
1074 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1075 ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1076 if (ret)
1077 goto failed_send;
1078
1079 req->handler = zfcp_fsf_send_ct_handler;
1080 req->qtcb->header.port_handle = wka_port->handle;
1081 ct->d_id = wka_port->d_id;
1082 req->data = ct;
1083
1084 zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1085
1086 ret = zfcp_fsf_req_send(req);
1087 if (ret)
1088 goto failed_send;
1089
1090 goto out;
1091
1092 failed_send:
1093 zfcp_fsf_req_free(req);
1094 out:
1095 spin_unlock_irq(&qdio->req_q_lock);
1096 return ret;
1097 }
1098
1099 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1100 {
1101 struct zfcp_fsf_ct_els *send_els = req->data;
1102 struct fsf_qtcb_header *header = &req->qtcb->header;
1103
1104 send_els->status = -EINVAL;
1105
1106 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1107 goto skip_fsfstatus;
1108
1109 switch (header->fsf_status) {
1110 case FSF_GOOD:
1111 send_els->status = 0;
1112 zfcp_dbf_san_res("fsselh1", req);
1113 break;
1114 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1115 zfcp_fsf_class_not_supp(req);
1116 break;
1117 case FSF_ADAPTER_STATUS_AVAILABLE:
1118 switch (header->fsf_status_qual.word[0]){
1119 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1120 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1121 case FSF_SQ_RETRY_IF_POSSIBLE:
1122 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1123 break;
1124 }
1125 break;
1126 case FSF_ELS_COMMAND_REJECTED:
1127 case FSF_PAYLOAD_SIZE_MISMATCH:
1128 case FSF_REQUEST_SIZE_TOO_LARGE:
1129 case FSF_RESPONSE_SIZE_TOO_LARGE:
1130 break;
1131 case FSF_SBAL_MISMATCH:
1132 /* should never occur, avoided in zfcp_fsf_send_els */
1133 /* fall through */
1134 default:
1135 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1136 break;
1137 }
1138 skip_fsfstatus:
1139 if (send_els->handler)
1140 send_els->handler(send_els->handler_data);
1141 }
1142
1143 /**
1144 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1145 * @els: pointer to struct zfcp_send_els with data for the command
1146 */
1147 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1148 struct zfcp_fsf_ct_els *els, unsigned int timeout)
1149 {
1150 struct zfcp_fsf_req *req;
1151 struct zfcp_qdio *qdio = adapter->qdio;
1152 int ret = -EIO;
1153
1154 spin_lock_irq(&qdio->req_q_lock);
1155 if (zfcp_qdio_sbal_get(qdio))
1156 goto out;
1157
1158 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1159 SBAL_SFLAGS0_TYPE_WRITE_READ, NULL);
1160
1161 if (IS_ERR(req)) {
1162 ret = PTR_ERR(req);
1163 goto out;
1164 }
1165
1166 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1167
1168 if (!zfcp_adapter_multi_buffer_active(adapter))
1169 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1170
1171 ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1172
1173 if (ret)
1174 goto failed_send;
1175
1176 hton24(req->qtcb->bottom.support.d_id, d_id);
1177 req->handler = zfcp_fsf_send_els_handler;
1178 els->d_id = d_id;
1179 req->data = els;
1180
1181 zfcp_dbf_san_req("fssels1", req, d_id);
1182
1183 ret = zfcp_fsf_req_send(req);
1184 if (ret)
1185 goto failed_send;
1186
1187 goto out;
1188
1189 failed_send:
1190 zfcp_fsf_req_free(req);
1191 out:
1192 spin_unlock_irq(&qdio->req_q_lock);
1193 return ret;
1194 }
1195
1196 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1197 {
1198 struct zfcp_fsf_req *req;
1199 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1200 int retval = -EIO;
1201
1202 spin_lock_irq(&qdio->req_q_lock);
1203 if (zfcp_qdio_sbal_get(qdio))
1204 goto out;
1205
1206 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1207 SBAL_SFLAGS0_TYPE_READ,
1208 qdio->adapter->pool.erp_req);
1209
1210 if (IS_ERR(req)) {
1211 retval = PTR_ERR(req);
1212 goto out;
1213 }
1214
1215 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1216 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1217
1218 req->qtcb->bottom.config.feature_selection =
1219 FSF_FEATURE_NOTIFICATION_LOST |
1220 FSF_FEATURE_UPDATE_ALERT;
1221 req->erp_action = erp_action;
1222 req->handler = zfcp_fsf_exchange_config_data_handler;
1223 erp_action->fsf_req_id = req->req_id;
1224
1225 zfcp_fsf_start_erp_timer(req);
1226 retval = zfcp_fsf_req_send(req);
1227 if (retval) {
1228 zfcp_fsf_req_free(req);
1229 erp_action->fsf_req_id = 0;
1230 }
1231 out:
1232 spin_unlock_irq(&qdio->req_q_lock);
1233 return retval;
1234 }
1235
1236 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1237 struct fsf_qtcb_bottom_config *data)
1238 {
1239 struct zfcp_fsf_req *req = NULL;
1240 int retval = -EIO;
1241
1242 spin_lock_irq(&qdio->req_q_lock);
1243 if (zfcp_qdio_sbal_get(qdio))
1244 goto out_unlock;
1245
1246 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1247 SBAL_SFLAGS0_TYPE_READ, NULL);
1248
1249 if (IS_ERR(req)) {
1250 retval = PTR_ERR(req);
1251 goto out_unlock;
1252 }
1253
1254 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1255 req->handler = zfcp_fsf_exchange_config_data_handler;
1256
1257 req->qtcb->bottom.config.feature_selection =
1258 FSF_FEATURE_NOTIFICATION_LOST |
1259 FSF_FEATURE_UPDATE_ALERT;
1260
1261 if (data)
1262 req->data = data;
1263
1264 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1265 retval = zfcp_fsf_req_send(req);
1266 spin_unlock_irq(&qdio->req_q_lock);
1267 if (!retval)
1268 wait_for_completion(&req->completion);
1269
1270 zfcp_fsf_req_free(req);
1271 return retval;
1272
1273 out_unlock:
1274 spin_unlock_irq(&qdio->req_q_lock);
1275 return retval;
1276 }
1277
1278 /**
1279 * zfcp_fsf_exchange_port_data - request information about local port
1280 * @erp_action: ERP action for the adapter for which port data is requested
1281 * Returns: 0 on success, error otherwise
1282 */
1283 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1284 {
1285 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1286 struct zfcp_fsf_req *req;
1287 int retval = -EIO;
1288
1289 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1290 return -EOPNOTSUPP;
1291
1292 spin_lock_irq(&qdio->req_q_lock);
1293 if (zfcp_qdio_sbal_get(qdio))
1294 goto out;
1295
1296 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1297 SBAL_SFLAGS0_TYPE_READ,
1298 qdio->adapter->pool.erp_req);
1299
1300 if (IS_ERR(req)) {
1301 retval = PTR_ERR(req);
1302 goto out;
1303 }
1304
1305 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1306 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1307
1308 req->handler = zfcp_fsf_exchange_port_data_handler;
1309 req->erp_action = erp_action;
1310 erp_action->fsf_req_id = req->req_id;
1311
1312 zfcp_fsf_start_erp_timer(req);
1313 retval = zfcp_fsf_req_send(req);
1314 if (retval) {
1315 zfcp_fsf_req_free(req);
1316 erp_action->fsf_req_id = 0;
1317 }
1318 out:
1319 spin_unlock_irq(&qdio->req_q_lock);
1320 return retval;
1321 }
1322
1323 /**
1324 * zfcp_fsf_exchange_port_data_sync - request information about local port
1325 * @qdio: pointer to struct zfcp_qdio
1326 * @data: pointer to struct fsf_qtcb_bottom_port
1327 * Returns: 0 on success, error otherwise
1328 */
1329 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1330 struct fsf_qtcb_bottom_port *data)
1331 {
1332 struct zfcp_fsf_req *req = NULL;
1333 int retval = -EIO;
1334
1335 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1336 return -EOPNOTSUPP;
1337
1338 spin_lock_irq(&qdio->req_q_lock);
1339 if (zfcp_qdio_sbal_get(qdio))
1340 goto out_unlock;
1341
1342 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1343 SBAL_SFLAGS0_TYPE_READ, NULL);
1344
1345 if (IS_ERR(req)) {
1346 retval = PTR_ERR(req);
1347 goto out_unlock;
1348 }
1349
1350 if (data)
1351 req->data = data;
1352
1353 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1354
1355 req->handler = zfcp_fsf_exchange_port_data_handler;
1356 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1357 retval = zfcp_fsf_req_send(req);
1358 spin_unlock_irq(&qdio->req_q_lock);
1359
1360 if (!retval)
1361 wait_for_completion(&req->completion);
1362
1363 zfcp_fsf_req_free(req);
1364
1365 return retval;
1366
1367 out_unlock:
1368 spin_unlock_irq(&qdio->req_q_lock);
1369 return retval;
1370 }
1371
1372 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1373 {
1374 struct zfcp_port *port = req->data;
1375 struct fsf_qtcb_header *header = &req->qtcb->header;
1376 struct fc_els_flogi *plogi;
1377
1378 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1379 goto out;
1380
1381 switch (header->fsf_status) {
1382 case FSF_PORT_ALREADY_OPEN:
1383 break;
1384 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1385 dev_warn(&req->adapter->ccw_device->dev,
1386 "Not enough FCP adapter resources to open "
1387 "remote port 0x%016Lx\n",
1388 (unsigned long long)port->wwpn);
1389 zfcp_erp_set_port_status(port,
1390 ZFCP_STATUS_COMMON_ERP_FAILED);
1391 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1392 break;
1393 case FSF_ADAPTER_STATUS_AVAILABLE:
1394 switch (header->fsf_status_qual.word[0]) {
1395 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1396 /* no zfcp_fc_test_link() with failed open port */
1397 /* fall through */
1398 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1399 case FSF_SQ_NO_RETRY_POSSIBLE:
1400 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1401 break;
1402 }
1403 break;
1404 case FSF_GOOD:
1405 port->handle = header->port_handle;
1406 atomic_or(ZFCP_STATUS_COMMON_OPEN |
1407 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1408 atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_BOXED,
1409 &port->status);
1410 /* check whether D_ID has changed during open */
1411 /*
1412 * FIXME: This check is not airtight, as the FCP channel does
1413 * not monitor closures of target port connections caused on
1414 * the remote side. Thus, they might miss out on invalidating
1415 * locally cached WWPNs (and other N_Port parameters) of gone
1416 * target ports. So, our heroic attempt to make things safe
1417 * could be undermined by 'open port' response data tagged with
1418 * obsolete WWPNs. Another reason to monitor potential
1419 * connection closures ourself at least (by interpreting
1420 * incoming ELS' and unsolicited status). It just crosses my
1421 * mind that one should be able to cross-check by means of
1422 * another GID_PN straight after a port has been opened.
1423 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1424 */
1425 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1426 if (req->qtcb->bottom.support.els1_length >=
1427 FSF_PLOGI_MIN_LEN)
1428 zfcp_fc_plogi_evaluate(port, plogi);
1429 break;
1430 case FSF_UNKNOWN_OP_SUBTYPE:
1431 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1432 break;
1433 }
1434
1435 out:
1436 put_device(&port->dev);
1437 }
1438
1439 /**
1440 * zfcp_fsf_open_port - create and send open port request
1441 * @erp_action: pointer to struct zfcp_erp_action
1442 * Returns: 0 on success, error otherwise
1443 */
1444 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1445 {
1446 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1447 struct zfcp_port *port = erp_action->port;
1448 struct zfcp_fsf_req *req;
1449 int retval = -EIO;
1450
1451 spin_lock_irq(&qdio->req_q_lock);
1452 if (zfcp_qdio_sbal_get(qdio))
1453 goto out;
1454
1455 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1456 SBAL_SFLAGS0_TYPE_READ,
1457 qdio->adapter->pool.erp_req);
1458
1459 if (IS_ERR(req)) {
1460 retval = PTR_ERR(req);
1461 goto out;
1462 }
1463
1464 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1465 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1466
1467 req->handler = zfcp_fsf_open_port_handler;
1468 hton24(req->qtcb->bottom.support.d_id, port->d_id);
1469 req->data = port;
1470 req->erp_action = erp_action;
1471 erp_action->fsf_req_id = req->req_id;
1472 get_device(&port->dev);
1473
1474 zfcp_fsf_start_erp_timer(req);
1475 retval = zfcp_fsf_req_send(req);
1476 if (retval) {
1477 zfcp_fsf_req_free(req);
1478 erp_action->fsf_req_id = 0;
1479 put_device(&port->dev);
1480 }
1481 out:
1482 spin_unlock_irq(&qdio->req_q_lock);
1483 return retval;
1484 }
1485
1486 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1487 {
1488 struct zfcp_port *port = req->data;
1489
1490 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1491 return;
1492
1493 switch (req->qtcb->header.fsf_status) {
1494 case FSF_PORT_HANDLE_NOT_VALID:
1495 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1496 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1497 break;
1498 case FSF_ADAPTER_STATUS_AVAILABLE:
1499 break;
1500 case FSF_GOOD:
1501 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1502 break;
1503 }
1504 }
1505
1506 /**
1507 * zfcp_fsf_close_port - create and send close port request
1508 * @erp_action: pointer to struct zfcp_erp_action
1509 * Returns: 0 on success, error otherwise
1510 */
1511 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1512 {
1513 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1514 struct zfcp_fsf_req *req;
1515 int retval = -EIO;
1516
1517 spin_lock_irq(&qdio->req_q_lock);
1518 if (zfcp_qdio_sbal_get(qdio))
1519 goto out;
1520
1521 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1522 SBAL_SFLAGS0_TYPE_READ,
1523 qdio->adapter->pool.erp_req);
1524
1525 if (IS_ERR(req)) {
1526 retval = PTR_ERR(req);
1527 goto out;
1528 }
1529
1530 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1531 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1532
1533 req->handler = zfcp_fsf_close_port_handler;
1534 req->data = erp_action->port;
1535 req->erp_action = erp_action;
1536 req->qtcb->header.port_handle = erp_action->port->handle;
1537 erp_action->fsf_req_id = req->req_id;
1538
1539 zfcp_fsf_start_erp_timer(req);
1540 retval = zfcp_fsf_req_send(req);
1541 if (retval) {
1542 zfcp_fsf_req_free(req);
1543 erp_action->fsf_req_id = 0;
1544 }
1545 out:
1546 spin_unlock_irq(&qdio->req_q_lock);
1547 return retval;
1548 }
1549
1550 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1551 {
1552 struct zfcp_fc_wka_port *wka_port = req->data;
1553 struct fsf_qtcb_header *header = &req->qtcb->header;
1554
1555 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1556 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1557 goto out;
1558 }
1559
1560 switch (header->fsf_status) {
1561 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1562 dev_warn(&req->adapter->ccw_device->dev,
1563 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1564 /* fall through */
1565 case FSF_ADAPTER_STATUS_AVAILABLE:
1566 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1567 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1568 break;
1569 case FSF_GOOD:
1570 wka_port->handle = header->port_handle;
1571 /* fall through */
1572 case FSF_PORT_ALREADY_OPEN:
1573 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1574 }
1575 out:
1576 wake_up(&wka_port->completion_wq);
1577 }
1578
1579 /**
1580 * zfcp_fsf_open_wka_port - create and send open wka-port request
1581 * @wka_port: pointer to struct zfcp_fc_wka_port
1582 * Returns: 0 on success, error otherwise
1583 */
1584 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1585 {
1586 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1587 struct zfcp_fsf_req *req;
1588 int retval = -EIO;
1589
1590 spin_lock_irq(&qdio->req_q_lock);
1591 if (zfcp_qdio_sbal_get(qdio))
1592 goto out;
1593
1594 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1595 SBAL_SFLAGS0_TYPE_READ,
1596 qdio->adapter->pool.erp_req);
1597
1598 if (IS_ERR(req)) {
1599 retval = PTR_ERR(req);
1600 goto out;
1601 }
1602
1603 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1604 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1605
1606 req->handler = zfcp_fsf_open_wka_port_handler;
1607 hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1608 req->data = wka_port;
1609
1610 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1611 retval = zfcp_fsf_req_send(req);
1612 if (retval)
1613 zfcp_fsf_req_free(req);
1614 out:
1615 spin_unlock_irq(&qdio->req_q_lock);
1616 if (!retval)
1617 zfcp_dbf_rec_run_wka("fsowp_1", wka_port, req->req_id);
1618 return retval;
1619 }
1620
1621 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1622 {
1623 struct zfcp_fc_wka_port *wka_port = req->data;
1624
1625 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1626 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1627 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1628 }
1629
1630 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1631 wake_up(&wka_port->completion_wq);
1632 }
1633
1634 /**
1635 * zfcp_fsf_close_wka_port - create and send close wka port request
1636 * @wka_port: WKA port to open
1637 * Returns: 0 on success, error otherwise
1638 */
1639 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1640 {
1641 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1642 struct zfcp_fsf_req *req;
1643 int retval = -EIO;
1644
1645 spin_lock_irq(&qdio->req_q_lock);
1646 if (zfcp_qdio_sbal_get(qdio))
1647 goto out;
1648
1649 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1650 SBAL_SFLAGS0_TYPE_READ,
1651 qdio->adapter->pool.erp_req);
1652
1653 if (IS_ERR(req)) {
1654 retval = PTR_ERR(req);
1655 goto out;
1656 }
1657
1658 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1659 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1660
1661 req->handler = zfcp_fsf_close_wka_port_handler;
1662 req->data = wka_port;
1663 req->qtcb->header.port_handle = wka_port->handle;
1664
1665 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1666 retval = zfcp_fsf_req_send(req);
1667 if (retval)
1668 zfcp_fsf_req_free(req);
1669 out:
1670 spin_unlock_irq(&qdio->req_q_lock);
1671 if (!retval)
1672 zfcp_dbf_rec_run_wka("fscwp_1", wka_port, req->req_id);
1673 return retval;
1674 }
1675
1676 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1677 {
1678 struct zfcp_port *port = req->data;
1679 struct fsf_qtcb_header *header = &req->qtcb->header;
1680 struct scsi_device *sdev;
1681
1682 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1683 return;
1684
1685 switch (header->fsf_status) {
1686 case FSF_PORT_HANDLE_NOT_VALID:
1687 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
1688 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1689 break;
1690 case FSF_PORT_BOXED:
1691 /* can't use generic zfcp_erp_modify_port_status because
1692 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1693 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1694 shost_for_each_device(sdev, port->adapter->scsi_host)
1695 if (sdev_to_zfcp(sdev)->port == port)
1696 atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
1697 &sdev_to_zfcp(sdev)->status);
1698 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1699 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1700 "fscpph2");
1701 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1702 break;
1703 case FSF_ADAPTER_STATUS_AVAILABLE:
1704 switch (header->fsf_status_qual.word[0]) {
1705 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1706 /* fall through */
1707 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1708 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1709 break;
1710 }
1711 break;
1712 case FSF_GOOD:
1713 /* can't use generic zfcp_erp_modify_port_status because
1714 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1715 */
1716 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1717 shost_for_each_device(sdev, port->adapter->scsi_host)
1718 if (sdev_to_zfcp(sdev)->port == port)
1719 atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
1720 &sdev_to_zfcp(sdev)->status);
1721 break;
1722 }
1723 }
1724
1725 /**
1726 * zfcp_fsf_close_physical_port - close physical port
1727 * @erp_action: pointer to struct zfcp_erp_action
1728 * Returns: 0 on success
1729 */
1730 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1731 {
1732 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1733 struct zfcp_fsf_req *req;
1734 int retval = -EIO;
1735
1736 spin_lock_irq(&qdio->req_q_lock);
1737 if (zfcp_qdio_sbal_get(qdio))
1738 goto out;
1739
1740 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1741 SBAL_SFLAGS0_TYPE_READ,
1742 qdio->adapter->pool.erp_req);
1743
1744 if (IS_ERR(req)) {
1745 retval = PTR_ERR(req);
1746 goto out;
1747 }
1748
1749 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1750 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1751
1752 req->data = erp_action->port;
1753 req->qtcb->header.port_handle = erp_action->port->handle;
1754 req->erp_action = erp_action;
1755 req->handler = zfcp_fsf_close_physical_port_handler;
1756 erp_action->fsf_req_id = req->req_id;
1757
1758 zfcp_fsf_start_erp_timer(req);
1759 retval = zfcp_fsf_req_send(req);
1760 if (retval) {
1761 zfcp_fsf_req_free(req);
1762 erp_action->fsf_req_id = 0;
1763 }
1764 out:
1765 spin_unlock_irq(&qdio->req_q_lock);
1766 return retval;
1767 }
1768
1769 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1770 {
1771 struct zfcp_adapter *adapter = req->adapter;
1772 struct scsi_device *sdev = req->data;
1773 struct zfcp_scsi_dev *zfcp_sdev;
1774 struct fsf_qtcb_header *header = &req->qtcb->header;
1775 union fsf_status_qual *qual = &header->fsf_status_qual;
1776
1777 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1778 return;
1779
1780 zfcp_sdev = sdev_to_zfcp(sdev);
1781
1782 atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1783 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1784 &zfcp_sdev->status);
1785
1786 switch (header->fsf_status) {
1787
1788 case FSF_PORT_HANDLE_NOT_VALID:
1789 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
1790 /* fall through */
1791 case FSF_LUN_ALREADY_OPEN:
1792 break;
1793 case FSF_PORT_BOXED:
1794 zfcp_erp_set_port_status(zfcp_sdev->port,
1795 ZFCP_STATUS_COMMON_ACCESS_BOXED);
1796 zfcp_erp_port_reopen(zfcp_sdev->port,
1797 ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
1798 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1799 break;
1800 case FSF_LUN_SHARING_VIOLATION:
1801 if (qual->word[0])
1802 dev_warn(&zfcp_sdev->port->adapter->ccw_device->dev,
1803 "LUN 0x%Lx on port 0x%Lx is already in "
1804 "use by CSS%d, MIF Image ID %x\n",
1805 zfcp_scsi_dev_lun(sdev),
1806 (unsigned long long)zfcp_sdev->port->wwpn,
1807 qual->fsf_queue_designator.cssid,
1808 qual->fsf_queue_designator.hla);
1809 zfcp_erp_set_lun_status(sdev,
1810 ZFCP_STATUS_COMMON_ERP_FAILED |
1811 ZFCP_STATUS_COMMON_ACCESS_DENIED);
1812 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1813 break;
1814 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1815 dev_warn(&adapter->ccw_device->dev,
1816 "No handle is available for LUN "
1817 "0x%016Lx on port 0x%016Lx\n",
1818 (unsigned long long)zfcp_scsi_dev_lun(sdev),
1819 (unsigned long long)zfcp_sdev->port->wwpn);
1820 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1821 /* fall through */
1822 case FSF_INVALID_COMMAND_OPTION:
1823 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1824 break;
1825 case FSF_ADAPTER_STATUS_AVAILABLE:
1826 switch (header->fsf_status_qual.word[0]) {
1827 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1828 zfcp_fc_test_link(zfcp_sdev->port);
1829 /* fall through */
1830 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1831 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1832 break;
1833 }
1834 break;
1835
1836 case FSF_GOOD:
1837 zfcp_sdev->lun_handle = header->lun_handle;
1838 atomic_or(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1839 break;
1840 }
1841 }
1842
1843 /**
1844 * zfcp_fsf_open_lun - open LUN
1845 * @erp_action: pointer to struct zfcp_erp_action
1846 * Returns: 0 on success, error otherwise
1847 */
1848 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1849 {
1850 struct zfcp_adapter *adapter = erp_action->adapter;
1851 struct zfcp_qdio *qdio = adapter->qdio;
1852 struct zfcp_fsf_req *req;
1853 int retval = -EIO;
1854
1855 spin_lock_irq(&qdio->req_q_lock);
1856 if (zfcp_qdio_sbal_get(qdio))
1857 goto out;
1858
1859 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1860 SBAL_SFLAGS0_TYPE_READ,
1861 adapter->pool.erp_req);
1862
1863 if (IS_ERR(req)) {
1864 retval = PTR_ERR(req);
1865 goto out;
1866 }
1867
1868 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1869 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1870
1871 req->qtcb->header.port_handle = erp_action->port->handle;
1872 req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1873 req->handler = zfcp_fsf_open_lun_handler;
1874 req->data = erp_action->sdev;
1875 req->erp_action = erp_action;
1876 erp_action->fsf_req_id = req->req_id;
1877
1878 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1879 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1880
1881 zfcp_fsf_start_erp_timer(req);
1882 retval = zfcp_fsf_req_send(req);
1883 if (retval) {
1884 zfcp_fsf_req_free(req);
1885 erp_action->fsf_req_id = 0;
1886 }
1887 out:
1888 spin_unlock_irq(&qdio->req_q_lock);
1889 return retval;
1890 }
1891
1892 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1893 {
1894 struct scsi_device *sdev = req->data;
1895 struct zfcp_scsi_dev *zfcp_sdev;
1896
1897 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1898 return;
1899
1900 zfcp_sdev = sdev_to_zfcp(sdev);
1901
1902 switch (req->qtcb->header.fsf_status) {
1903 case FSF_PORT_HANDLE_NOT_VALID:
1904 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
1905 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1906 break;
1907 case FSF_LUN_HANDLE_NOT_VALID:
1908 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
1909 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1910 break;
1911 case FSF_PORT_BOXED:
1912 zfcp_erp_set_port_status(zfcp_sdev->port,
1913 ZFCP_STATUS_COMMON_ACCESS_BOXED);
1914 zfcp_erp_port_reopen(zfcp_sdev->port,
1915 ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
1916 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1917 break;
1918 case FSF_ADAPTER_STATUS_AVAILABLE:
1919 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1920 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1921 zfcp_fc_test_link(zfcp_sdev->port);
1922 /* fall through */
1923 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1924 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1925 break;
1926 }
1927 break;
1928 case FSF_GOOD:
1929 atomic_andnot(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1930 break;
1931 }
1932 }
1933
1934 /**
1935 * zfcp_fsf_close_LUN - close LUN
1936 * @erp_action: pointer to erp_action triggering the "close LUN"
1937 * Returns: 0 on success, error otherwise
1938 */
1939 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
1940 {
1941 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1942 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1943 struct zfcp_fsf_req *req;
1944 int retval = -EIO;
1945
1946 spin_lock_irq(&qdio->req_q_lock);
1947 if (zfcp_qdio_sbal_get(qdio))
1948 goto out;
1949
1950 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1951 SBAL_SFLAGS0_TYPE_READ,
1952 qdio->adapter->pool.erp_req);
1953
1954 if (IS_ERR(req)) {
1955 retval = PTR_ERR(req);
1956 goto out;
1957 }
1958
1959 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1960 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1961
1962 req->qtcb->header.port_handle = erp_action->port->handle;
1963 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1964 req->handler = zfcp_fsf_close_lun_handler;
1965 req->data = erp_action->sdev;
1966 req->erp_action = erp_action;
1967 erp_action->fsf_req_id = req->req_id;
1968
1969 zfcp_fsf_start_erp_timer(req);
1970 retval = zfcp_fsf_req_send(req);
1971 if (retval) {
1972 zfcp_fsf_req_free(req);
1973 erp_action->fsf_req_id = 0;
1974 }
1975 out:
1976 spin_unlock_irq(&qdio->req_q_lock);
1977 return retval;
1978 }
1979
1980 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
1981 {
1982 lat_rec->sum += lat;
1983 lat_rec->min = min(lat_rec->min, lat);
1984 lat_rec->max = max(lat_rec->max, lat);
1985 }
1986
1987 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
1988 {
1989 struct fsf_qual_latency_info *lat_in;
1990 struct latency_cont *lat = NULL;
1991 struct zfcp_scsi_dev *zfcp_sdev;
1992 struct zfcp_blk_drv_data blktrc;
1993 int ticks = req->adapter->timer_ticks;
1994
1995 lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
1996
1997 blktrc.flags = 0;
1998 blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
1999 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2000 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2001 blktrc.inb_usage = 0;
2002 blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
2003
2004 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
2005 !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2006 zfcp_sdev = sdev_to_zfcp(scsi->device);
2007 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2008 blktrc.channel_lat = lat_in->channel_lat * ticks;
2009 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2010
2011 switch (req->qtcb->bottom.io.data_direction) {
2012 case FSF_DATADIR_DIF_READ_STRIP:
2013 case FSF_DATADIR_DIF_READ_CONVERT:
2014 case FSF_DATADIR_READ:
2015 lat = &zfcp_sdev->latencies.read;
2016 break;
2017 case FSF_DATADIR_DIF_WRITE_INSERT:
2018 case FSF_DATADIR_DIF_WRITE_CONVERT:
2019 case FSF_DATADIR_WRITE:
2020 lat = &zfcp_sdev->latencies.write;
2021 break;
2022 case FSF_DATADIR_CMND:
2023 lat = &zfcp_sdev->latencies.cmd;
2024 break;
2025 }
2026
2027 if (lat) {
2028 spin_lock(&zfcp_sdev->latencies.lock);
2029 zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2030 zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2031 lat->counter++;
2032 spin_unlock(&zfcp_sdev->latencies.lock);
2033 }
2034 }
2035
2036 blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2037 sizeof(blktrc));
2038 }
2039
2040 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
2041 {
2042 struct scsi_cmnd *scmnd = req->data;
2043 struct scsi_device *sdev = scmnd->device;
2044 struct zfcp_scsi_dev *zfcp_sdev;
2045 struct fsf_qtcb_header *header = &req->qtcb->header;
2046
2047 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2048 return;
2049
2050 zfcp_sdev = sdev_to_zfcp(sdev);
2051
2052 switch (header->fsf_status) {
2053 case FSF_HANDLE_MISMATCH:
2054 case FSF_PORT_HANDLE_NOT_VALID:
2055 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1");
2056 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2057 break;
2058 case FSF_FCPLUN_NOT_VALID:
2059 case FSF_LUN_HANDLE_NOT_VALID:
2060 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2061 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2062 break;
2063 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2064 zfcp_fsf_class_not_supp(req);
2065 break;
2066 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2067 dev_err(&req->adapter->ccw_device->dev,
2068 "Incorrect direction %d, LUN 0x%016Lx on port "
2069 "0x%016Lx closed\n",
2070 req->qtcb->bottom.io.data_direction,
2071 (unsigned long long)zfcp_scsi_dev_lun(sdev),
2072 (unsigned long long)zfcp_sdev->port->wwpn);
2073 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2074 "fssfch3");
2075 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2076 break;
2077 case FSF_CMND_LENGTH_NOT_VALID:
2078 dev_err(&req->adapter->ccw_device->dev,
2079 "Incorrect CDB length %d, LUN 0x%016Lx on "
2080 "port 0x%016Lx closed\n",
2081 req->qtcb->bottom.io.fcp_cmnd_length,
2082 (unsigned long long)zfcp_scsi_dev_lun(sdev),
2083 (unsigned long long)zfcp_sdev->port->wwpn);
2084 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2085 "fssfch4");
2086 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2087 break;
2088 case FSF_PORT_BOXED:
2089 zfcp_erp_set_port_status(zfcp_sdev->port,
2090 ZFCP_STATUS_COMMON_ACCESS_BOXED);
2091 zfcp_erp_port_reopen(zfcp_sdev->port,
2092 ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2093 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2094 break;
2095 case FSF_LUN_BOXED:
2096 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2097 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2098 "fssfch6");
2099 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2100 break;
2101 case FSF_ADAPTER_STATUS_AVAILABLE:
2102 if (header->fsf_status_qual.word[0] ==
2103 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2104 zfcp_fc_test_link(zfcp_sdev->port);
2105 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2106 break;
2107 }
2108 }
2109
2110 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2111 {
2112 struct scsi_cmnd *scpnt;
2113 struct fcp_resp_with_ext *fcp_rsp;
2114 unsigned long flags;
2115
2116 read_lock_irqsave(&req->adapter->abort_lock, flags);
2117
2118 scpnt = req->data;
2119 if (unlikely(!scpnt)) {
2120 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2121 return;
2122 }
2123
2124 zfcp_fsf_fcp_handler_common(req);
2125
2126 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2127 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2128 goto skip_fsfstatus;
2129 }
2130
2131 switch (req->qtcb->header.fsf_status) {
2132 case FSF_INCONSISTENT_PROT_DATA:
2133 case FSF_INVALID_PROT_PARM:
2134 set_host_byte(scpnt, DID_ERROR);
2135 goto skip_fsfstatus;
2136 case FSF_BLOCK_GUARD_CHECK_FAILURE:
2137 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2138 goto skip_fsfstatus;
2139 case FSF_APP_TAG_CHECK_FAILURE:
2140 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2141 goto skip_fsfstatus;
2142 case FSF_REF_TAG_CHECK_FAILURE:
2143 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2144 goto skip_fsfstatus;
2145 }
2146 BUILD_BUG_ON(sizeof(struct fcp_resp_with_ext) > FSF_FCP_RSP_SIZE);
2147 fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
2148 zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2149
2150 skip_fsfstatus:
2151 zfcp_fsf_req_trace(req, scpnt);
2152 zfcp_dbf_scsi_result(scpnt, req);
2153
2154 scpnt->host_scribble = NULL;
2155 (scpnt->scsi_done) (scpnt);
2156 /*
2157 * We must hold this lock until scsi_done has been called.
2158 * Otherwise we may call scsi_done after abort regarding this
2159 * command has completed.
2160 * Note: scsi_done must not block!
2161 */
2162 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2163 }
2164
2165 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2166 {
2167 switch (scsi_get_prot_op(scsi_cmnd)) {
2168 case SCSI_PROT_NORMAL:
2169 switch (scsi_cmnd->sc_data_direction) {
2170 case DMA_NONE:
2171 *data_dir = FSF_DATADIR_CMND;
2172 break;
2173 case DMA_FROM_DEVICE:
2174 *data_dir = FSF_DATADIR_READ;
2175 break;
2176 case DMA_TO_DEVICE:
2177 *data_dir = FSF_DATADIR_WRITE;
2178 break;
2179 case DMA_BIDIRECTIONAL:
2180 return -EINVAL;
2181 }
2182 break;
2183
2184 case SCSI_PROT_READ_STRIP:
2185 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2186 break;
2187 case SCSI_PROT_WRITE_INSERT:
2188 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2189 break;
2190 case SCSI_PROT_READ_PASS:
2191 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2192 break;
2193 case SCSI_PROT_WRITE_PASS:
2194 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2195 break;
2196 default:
2197 return -EINVAL;
2198 }
2199
2200 return 0;
2201 }
2202
2203 /**
2204 * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2205 * @scsi_cmnd: scsi command to be sent
2206 */
2207 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2208 {
2209 struct zfcp_fsf_req *req;
2210 struct fcp_cmnd *fcp_cmnd;
2211 u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
2212 int retval = -EIO;
2213 struct scsi_device *sdev = scsi_cmnd->device;
2214 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2215 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2216 struct zfcp_qdio *qdio = adapter->qdio;
2217 struct fsf_qtcb_bottom_io *io;
2218 unsigned long flags;
2219
2220 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2221 ZFCP_STATUS_COMMON_UNBLOCKED)))
2222 return -EBUSY;
2223
2224 spin_lock_irqsave(&qdio->req_q_lock, flags);
2225 if (atomic_read(&qdio->req_q_free) <= 0) {
2226 atomic_inc(&qdio->req_q_full);
2227 goto out;
2228 }
2229
2230 if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2231 sbtype = SBAL_SFLAGS0_TYPE_WRITE;
2232
2233 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2234 sbtype, adapter->pool.scsi_req);
2235
2236 if (IS_ERR(req)) {
2237 retval = PTR_ERR(req);
2238 goto out;
2239 }
2240
2241 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2242
2243 io = &req->qtcb->bottom.io;
2244 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2245 req->data = scsi_cmnd;
2246 req->handler = zfcp_fsf_fcp_cmnd_handler;
2247 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2248 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2249 io->service_class = FSF_CLASS_3;
2250 io->fcp_cmnd_length = FCP_CMND_LEN;
2251
2252 if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2253 io->data_block_length = scsi_cmnd->device->sector_size;
2254 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2255 }
2256
2257 if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction))
2258 goto failed_scsi_cmnd;
2259
2260 BUILD_BUG_ON(sizeof(struct fcp_cmnd) > FSF_FCP_CMND_SIZE);
2261 fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
2262 zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd, 0);
2263
2264 if ((scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) &&
2265 scsi_prot_sg_count(scsi_cmnd)) {
2266 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2267 scsi_prot_sg_count(scsi_cmnd));
2268 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2269 scsi_prot_sglist(scsi_cmnd));
2270 if (retval)
2271 goto failed_scsi_cmnd;
2272 io->prot_data_length = zfcp_qdio_real_bytes(
2273 scsi_prot_sglist(scsi_cmnd));
2274 }
2275
2276 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2277 scsi_sglist(scsi_cmnd));
2278 if (unlikely(retval))
2279 goto failed_scsi_cmnd;
2280
2281 zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2282 if (zfcp_adapter_multi_buffer_active(adapter))
2283 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2284
2285 retval = zfcp_fsf_req_send(req);
2286 if (unlikely(retval))
2287 goto failed_scsi_cmnd;
2288
2289 goto out;
2290
2291 failed_scsi_cmnd:
2292 zfcp_fsf_req_free(req);
2293 scsi_cmnd->host_scribble = NULL;
2294 out:
2295 spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2296 return retval;
2297 }
2298
2299 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2300 {
2301 struct fcp_resp_with_ext *fcp_rsp;
2302 struct fcp_resp_rsp_info *rsp_info;
2303
2304 zfcp_fsf_fcp_handler_common(req);
2305
2306 fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
2307 rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2308
2309 if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2310 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2311 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2312 }
2313
2314 /**
2315 * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
2316 * @scmnd: SCSI command to send the task management command for
2317 * @tm_flags: unsigned byte for task management flags
2318 * Returns: on success pointer to struct fsf_req, NULL otherwise
2319 */
2320 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
2321 u8 tm_flags)
2322 {
2323 struct zfcp_fsf_req *req = NULL;
2324 struct fcp_cmnd *fcp_cmnd;
2325 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
2326 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2327
2328 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2329 ZFCP_STATUS_COMMON_UNBLOCKED)))
2330 return NULL;
2331
2332 spin_lock_irq(&qdio->req_q_lock);
2333 if (zfcp_qdio_sbal_get(qdio))
2334 goto out;
2335
2336 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2337 SBAL_SFLAGS0_TYPE_WRITE,
2338 qdio->adapter->pool.scsi_req);
2339
2340 if (IS_ERR(req)) {
2341 req = NULL;
2342 goto out;
2343 }
2344
2345 req->data = scmnd;
2346 req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2347 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2348 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2349 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2350 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2351 req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2352
2353 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2354
2355 fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
2356 zfcp_fc_scsi_to_fcp(fcp_cmnd, scmnd, tm_flags);
2357
2358 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2359 if (!zfcp_fsf_req_send(req))
2360 goto out;
2361
2362 zfcp_fsf_req_free(req);
2363 req = NULL;
2364 out:
2365 spin_unlock_irq(&qdio->req_q_lock);
2366 return req;
2367 }
2368
2369 /**
2370 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2371 * @adapter: pointer to struct zfcp_adapter
2372 * @sbal_idx: response queue index of SBAL to be processed
2373 */
2374 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2375 {
2376 struct zfcp_adapter *adapter = qdio->adapter;
2377 struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2378 struct qdio_buffer_element *sbale;
2379 struct zfcp_fsf_req *fsf_req;
2380 unsigned long req_id;
2381 int idx;
2382
2383 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2384
2385 sbale = &sbal->element[idx];
2386 req_id = (unsigned long) sbale->addr;
2387 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2388
2389 if (!fsf_req) {
2390 /*
2391 * Unknown request means that we have potentially memory
2392 * corruption and must stop the machine immediately.
2393 */
2394 zfcp_qdio_siosl(adapter);
2395 panic("error: unknown req_id (%lx) on adapter %s.\n",
2396 req_id, dev_name(&adapter->ccw_device->dev));
2397 }
2398
2399 fsf_req->qdio_req.sbal_response = sbal_idx;
2400 zfcp_fsf_req_complete(fsf_req);
2401
2402 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
2403 break;
2404 }
2405 }
ubuntu-bionic-kernel mirror