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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
[linux-2.6/libata-dev.git] / drivers / s390 / scsi / zfcp_fsf.c
blobc7e148f33b2a8afbcd319689434b707a835e0645
1 /*
2 * zfcp device driver
3 *
4 * Implementation of FSF commands.
5 *
6 * Copyright IBM Corp. 2002, 2010
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_port_id(shost) = ntoh24(bottom->s_id);
487 fc_host_speed(shost) =
488 zfcp_fsf_convert_portspeed(bottom->fc_link_speed);
489 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
490
491 adapter->hydra_version = bottom->adapter_type;
492 adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK;
493 adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
494 (u16)FSF_STATUS_READS_RECOM);
495
496 if (fc_host_permanent_port_name(shost) == -1)
497 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
498
499 switch (bottom->fc_topology) {
500 case FSF_TOPO_P2P:
501 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
502 adapter->peer_wwpn = plogi->fl_wwpn;
503 adapter->peer_wwnn = plogi->fl_wwnn;
504 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
505 break;
506 case FSF_TOPO_FABRIC:
507 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
508 break;
509 case FSF_TOPO_AL:
510 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
511 /* fall through */
512 default:
513 dev_err(&adapter->ccw_device->dev,
514 "Unknown or unsupported arbitrated loop "
515 "fibre channel topology detected\n");
516 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1");
517 return -EIO;
518 }
519
520 zfcp_scsi_set_prot(adapter);
521
522 return 0;
523 }
524
525 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
526 {
527 struct zfcp_adapter *adapter = req->adapter;
528 struct fsf_qtcb *qtcb = req->qtcb;
529 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
530 struct Scsi_Host *shost = adapter->scsi_host;
531
532 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
533 return;
534
535 adapter->fsf_lic_version = bottom->lic_version;
536 adapter->adapter_features = bottom->adapter_features;
537 adapter->connection_features = bottom->connection_features;
538 adapter->peer_wwpn = 0;
539 adapter->peer_wwnn = 0;
540 adapter->peer_d_id = 0;
541
542 switch (qtcb->header.fsf_status) {
543 case FSF_GOOD:
544 if (zfcp_fsf_exchange_config_evaluate(req))
545 return;
546
547 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
548 dev_err(&adapter->ccw_device->dev,
549 "FCP adapter maximum QTCB size (%d bytes) "
550 "is too small\n",
551 bottom->max_qtcb_size);
552 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1");
553 return;
554 }
555 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
556 &adapter->status);
557 break;
558 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
559 fc_host_node_name(shost) = 0;
560 fc_host_port_name(shost) = 0;
561 fc_host_port_id(shost) = 0;
562 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
563 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
564 adapter->hydra_version = 0;
565
566 zfcp_fsf_link_down_info_eval(req,
567 &qtcb->header.fsf_status_qual.link_down_info);
568 break;
569 default:
570 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
571 return;
572 }
573
574 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
575 adapter->hardware_version = bottom->hardware_version;
576 memcpy(fc_host_serial_number(shost), bottom->serial_number,
577 min(FC_SERIAL_NUMBER_SIZE, 17));
578 EBCASC(fc_host_serial_number(shost),
579 min(FC_SERIAL_NUMBER_SIZE, 17));
580 }
581
582 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
583 dev_err(&adapter->ccw_device->dev,
584 "The FCP adapter only supports newer "
585 "control block versions\n");
586 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4");
587 return;
588 }
589 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
590 dev_err(&adapter->ccw_device->dev,
591 "The FCP adapter only supports older "
592 "control block versions\n");
593 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5");
594 }
595 }
596
597 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
598 {
599 struct zfcp_adapter *adapter = req->adapter;
600 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
601 struct Scsi_Host *shost = adapter->scsi_host;
602
603 if (req->data)
604 memcpy(req->data, bottom, sizeof(*bottom));
605
606 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
607 fc_host_permanent_port_name(shost) = bottom->wwpn;
608 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
609 } else
610 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
611 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
612 fc_host_supported_speeds(shost) =
613 zfcp_fsf_convert_portspeed(bottom->supported_speed);
614 memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
615 FC_FC4_LIST_SIZE);
616 memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
617 FC_FC4_LIST_SIZE);
618 }
619
620 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
621 {
622 struct fsf_qtcb *qtcb = req->qtcb;
623
624 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
625 return;
626
627 switch (qtcb->header.fsf_status) {
628 case FSF_GOOD:
629 zfcp_fsf_exchange_port_evaluate(req);
630 break;
631 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
632 zfcp_fsf_exchange_port_evaluate(req);
633 zfcp_fsf_link_down_info_eval(req,
634 &qtcb->header.fsf_status_qual.link_down_info);
635 break;
636 }
637 }
638
639 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
640 {
641 struct zfcp_fsf_req *req;
642
643 if (likely(pool))
644 req = mempool_alloc(pool, GFP_ATOMIC);
645 else
646 req = kmalloc(sizeof(*req), GFP_ATOMIC);
647
648 if (unlikely(!req))
649 return NULL;
650
651 memset(req, 0, sizeof(*req));
652 req->pool = pool;
653 return req;
654 }
655
656 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
657 {
658 struct fsf_qtcb *qtcb;
659
660 if (likely(pool))
661 qtcb = mempool_alloc(pool, GFP_ATOMIC);
662 else
663 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
664
665 if (unlikely(!qtcb))
666 return NULL;
667
668 memset(qtcb, 0, sizeof(*qtcb));
669 return qtcb;
670 }
671
672 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
673 u32 fsf_cmd, u8 sbtype,
674 mempool_t *pool)
675 {
676 struct zfcp_adapter *adapter = qdio->adapter;
677 struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
678
679 if (unlikely(!req))
680 return ERR_PTR(-ENOMEM);
681
682 if (adapter->req_no == 0)
683 adapter->req_no++;
684
685 INIT_LIST_HEAD(&req->list);
686 init_timer(&req->timer);
687 init_completion(&req->completion);
688
689 req->adapter = adapter;
690 req->fsf_command = fsf_cmd;
691 req->req_id = adapter->req_no;
692
693 if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
694 if (likely(pool))
695 req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
696 else
697 req->qtcb = zfcp_qtcb_alloc(NULL);
698
699 if (unlikely(!req->qtcb)) {
700 zfcp_fsf_req_free(req);
701 return ERR_PTR(-ENOMEM);
702 }
703
704 req->seq_no = adapter->fsf_req_seq_no;
705 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
706 req->qtcb->prefix.req_id = req->req_id;
707 req->qtcb->prefix.ulp_info = 26;
708 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
709 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
710 req->qtcb->header.req_handle = req->req_id;
711 req->qtcb->header.fsf_command = req->fsf_command;
712 }
713
714 zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
715 req->qtcb, sizeof(struct fsf_qtcb));
716
717 return req;
718 }
719
720 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
721 {
722 struct zfcp_adapter *adapter = req->adapter;
723 struct zfcp_qdio *qdio = adapter->qdio;
724 int with_qtcb = (req->qtcb != NULL);
725 int req_id = req->req_id;
726
727 zfcp_reqlist_add(adapter->req_list, req);
728
729 req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
730 req->issued = get_tod_clock();
731 if (zfcp_qdio_send(qdio, &req->qdio_req)) {
732 del_timer(&req->timer);
733 /* lookup request again, list might have changed */
734 zfcp_reqlist_find_rm(adapter->req_list, req_id);
735 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
736 return -EIO;
737 }
738
739 /* Don't increase for unsolicited status */
740 if (with_qtcb)
741 adapter->fsf_req_seq_no++;
742 adapter->req_no++;
743
744 return 0;
745 }
746
747 /**
748 * zfcp_fsf_status_read - send status read request
749 * @adapter: pointer to struct zfcp_adapter
750 * @req_flags: request flags
751 * Returns: 0 on success, ERROR otherwise
752 */
753 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
754 {
755 struct zfcp_adapter *adapter = qdio->adapter;
756 struct zfcp_fsf_req *req;
757 struct fsf_status_read_buffer *sr_buf;
758 struct page *page;
759 int retval = -EIO;
760
761 spin_lock_irq(&qdio->req_q_lock);
762 if (zfcp_qdio_sbal_get(qdio))
763 goto out;
764
765 req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS, 0,
766 adapter->pool.status_read_req);
767 if (IS_ERR(req)) {
768 retval = PTR_ERR(req);
769 goto out;
770 }
771
772 page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
773 if (!page) {
774 retval = -ENOMEM;
775 goto failed_buf;
776 }
777 sr_buf = page_address(page);
778 memset(sr_buf, 0, sizeof(*sr_buf));
779 req->data = sr_buf;
780
781 zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
782 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
783
784 retval = zfcp_fsf_req_send(req);
785 if (retval)
786 goto failed_req_send;
787
788 goto out;
789
790 failed_req_send:
791 req->data = NULL;
792 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
793 failed_buf:
794 zfcp_dbf_hba_fsf_uss("fssr__1", req);
795 zfcp_fsf_req_free(req);
796 out:
797 spin_unlock_irq(&qdio->req_q_lock);
798 return retval;
799 }
800
801 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
802 {
803 struct scsi_device *sdev = req->data;
804 struct zfcp_scsi_dev *zfcp_sdev;
805 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
806
807 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
808 return;
809
810 zfcp_sdev = sdev_to_zfcp(sdev);
811
812 switch (req->qtcb->header.fsf_status) {
813 case FSF_PORT_HANDLE_NOT_VALID:
814 if (fsq->word[0] == fsq->word[1]) {
815 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
816 "fsafch1");
817 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
818 }
819 break;
820 case FSF_LUN_HANDLE_NOT_VALID:
821 if (fsq->word[0] == fsq->word[1]) {
822 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
823 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
824 }
825 break;
826 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
827 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
828 break;
829 case FSF_PORT_BOXED:
830 zfcp_erp_set_port_status(zfcp_sdev->port,
831 ZFCP_STATUS_COMMON_ACCESS_BOXED);
832 zfcp_erp_port_reopen(zfcp_sdev->port,
833 ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
834 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
835 break;
836 case FSF_LUN_BOXED:
837 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
838 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
839 "fsafch4");
840 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
841 break;
842 case FSF_ADAPTER_STATUS_AVAILABLE:
843 switch (fsq->word[0]) {
844 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
845 zfcp_fc_test_link(zfcp_sdev->port);
846 /* fall through */
847 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
848 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
849 break;
850 }
851 break;
852 case FSF_GOOD:
853 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
854 break;
855 }
856 }
857
858 /**
859 * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
860 * @scmnd: The SCSI command to abort
861 * Returns: pointer to struct zfcp_fsf_req
862 */
863
864 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
865 {
866 struct zfcp_fsf_req *req = NULL;
867 struct scsi_device *sdev = scmnd->device;
868 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
869 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
870 unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
871
872 spin_lock_irq(&qdio->req_q_lock);
873 if (zfcp_qdio_sbal_get(qdio))
874 goto out;
875 req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
876 SBAL_SFLAGS0_TYPE_READ,
877 qdio->adapter->pool.scsi_abort);
878 if (IS_ERR(req)) {
879 req = NULL;
880 goto out;
881 }
882
883 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
884 ZFCP_STATUS_COMMON_UNBLOCKED)))
885 goto out_error_free;
886
887 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
888
889 req->data = sdev;
890 req->handler = zfcp_fsf_abort_fcp_command_handler;
891 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
892 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
893 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
894
895 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
896 if (!zfcp_fsf_req_send(req))
897 goto out;
898
899 out_error_free:
900 zfcp_fsf_req_free(req);
901 req = NULL;
902 out:
903 spin_unlock_irq(&qdio->req_q_lock);
904 return req;
905 }
906
907 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
908 {
909 struct zfcp_adapter *adapter = req->adapter;
910 struct zfcp_fsf_ct_els *ct = req->data;
911 struct fsf_qtcb_header *header = &req->qtcb->header;
912
913 ct->status = -EINVAL;
914
915 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
916 goto skip_fsfstatus;
917
918 switch (header->fsf_status) {
919 case FSF_GOOD:
920 zfcp_dbf_san_res("fsscth2", req);
921 ct->status = 0;
922 break;
923 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
924 zfcp_fsf_class_not_supp(req);
925 break;
926 case FSF_ADAPTER_STATUS_AVAILABLE:
927 switch (header->fsf_status_qual.word[0]){
928 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
929 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
930 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
931 break;
932 }
933 break;
934 case FSF_ACCESS_DENIED:
935 break;
936 case FSF_PORT_BOXED:
937 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
938 break;
939 case FSF_PORT_HANDLE_NOT_VALID:
940 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
941 /* fall through */
942 case FSF_GENERIC_COMMAND_REJECTED:
943 case FSF_PAYLOAD_SIZE_MISMATCH:
944 case FSF_REQUEST_SIZE_TOO_LARGE:
945 case FSF_RESPONSE_SIZE_TOO_LARGE:
946 case FSF_SBAL_MISMATCH:
947 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
948 break;
949 }
950
951 skip_fsfstatus:
952 if (ct->handler)
953 ct->handler(ct->handler_data);
954 }
955
956 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
957 struct zfcp_qdio_req *q_req,
958 struct scatterlist *sg_req,
959 struct scatterlist *sg_resp)
960 {
961 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
962 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
963 zfcp_qdio_set_sbale_last(qdio, q_req);
964 }
965
966 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
967 struct scatterlist *sg_req,
968 struct scatterlist *sg_resp)
969 {
970 struct zfcp_adapter *adapter = req->adapter;
971 struct zfcp_qdio *qdio = adapter->qdio;
972 struct fsf_qtcb *qtcb = req->qtcb;
973 u32 feat = adapter->adapter_features;
974
975 if (zfcp_adapter_multi_buffer_active(adapter)) {
976 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
977 return -EIO;
978 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
979 return -EIO;
980
981 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
982 zfcp_qdio_sbale_count(sg_req));
983 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
984 zfcp_qdio_set_scount(qdio, &req->qdio_req);
985 return 0;
986 }
987
988 /* use single, unchained SBAL if it can hold the request */
989 if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
990 zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req,
991 sg_req, sg_resp);
992 return 0;
993 }
994
995 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS))
996 return -EOPNOTSUPP;
997
998 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
999 return -EIO;
1000
1001 qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req);
1002
1003 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1004 zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req);
1005
1006 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
1007 return -EIO;
1008
1009 qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp);
1010
1011 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1012
1013 return 0;
1014 }
1015
1016 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1017 struct scatterlist *sg_req,
1018 struct scatterlist *sg_resp,
1019 unsigned int timeout)
1020 {
1021 int ret;
1022
1023 ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
1024 if (ret)
1025 return ret;
1026
1027 /* common settings for ct/gs and els requests */
1028 if (timeout > 255)
1029 timeout = 255; /* max value accepted by hardware */
1030 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1031 req->qtcb->bottom.support.timeout = timeout;
1032 zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1033
1034 return 0;
1035 }
1036
1037 /**
1038 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1039 * @ct: pointer to struct zfcp_send_ct with data for request
1040 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1041 */
1042 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1043 struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1044 unsigned int timeout)
1045 {
1046 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1047 struct zfcp_fsf_req *req;
1048 int ret = -EIO;
1049
1050 spin_lock_irq(&qdio->req_q_lock);
1051 if (zfcp_qdio_sbal_get(qdio))
1052 goto out;
1053
1054 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1055 SBAL_SFLAGS0_TYPE_WRITE_READ, pool);
1056
1057 if (IS_ERR(req)) {
1058 ret = PTR_ERR(req);
1059 goto out;
1060 }
1061
1062 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1063 ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1064 if (ret)
1065 goto failed_send;
1066
1067 req->handler = zfcp_fsf_send_ct_handler;
1068 req->qtcb->header.port_handle = wka_port->handle;
1069 req->data = ct;
1070
1071 zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1072
1073 ret = zfcp_fsf_req_send(req);
1074 if (ret)
1075 goto failed_send;
1076
1077 goto out;
1078
1079 failed_send:
1080 zfcp_fsf_req_free(req);
1081 out:
1082 spin_unlock_irq(&qdio->req_q_lock);
1083 return ret;
1084 }
1085
1086 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1087 {
1088 struct zfcp_fsf_ct_els *send_els = req->data;
1089 struct zfcp_port *port = send_els->port;
1090 struct fsf_qtcb_header *header = &req->qtcb->header;
1091
1092 send_els->status = -EINVAL;
1093
1094 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1095 goto skip_fsfstatus;
1096
1097 switch (header->fsf_status) {
1098 case FSF_GOOD:
1099 zfcp_dbf_san_res("fsselh1", req);
1100 send_els->status = 0;
1101 break;
1102 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1103 zfcp_fsf_class_not_supp(req);
1104 break;
1105 case FSF_ADAPTER_STATUS_AVAILABLE:
1106 switch (header->fsf_status_qual.word[0]){
1107 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1108 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1109 case FSF_SQ_RETRY_IF_POSSIBLE:
1110 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1111 break;
1112 }
1113 break;
1114 case FSF_ELS_COMMAND_REJECTED:
1115 case FSF_PAYLOAD_SIZE_MISMATCH:
1116 case FSF_REQUEST_SIZE_TOO_LARGE:
1117 case FSF_RESPONSE_SIZE_TOO_LARGE:
1118 break;
1119 case FSF_ACCESS_DENIED:
1120 if (port) {
1121 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1122 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1123 }
1124 break;
1125 case FSF_SBAL_MISMATCH:
1126 /* should never occur, avoided in zfcp_fsf_send_els */
1127 /* fall through */
1128 default:
1129 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1130 break;
1131 }
1132 skip_fsfstatus:
1133 if (send_els->handler)
1134 send_els->handler(send_els->handler_data);
1135 }
1136
1137 /**
1138 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1139 * @els: pointer to struct zfcp_send_els with data for the command
1140 */
1141 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1142 struct zfcp_fsf_ct_els *els, unsigned int timeout)
1143 {
1144 struct zfcp_fsf_req *req;
1145 struct zfcp_qdio *qdio = adapter->qdio;
1146 int ret = -EIO;
1147
1148 spin_lock_irq(&qdio->req_q_lock);
1149 if (zfcp_qdio_sbal_get(qdio))
1150 goto out;
1151
1152 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1153 SBAL_SFLAGS0_TYPE_WRITE_READ, NULL);
1154
1155 if (IS_ERR(req)) {
1156 ret = PTR_ERR(req);
1157 goto out;
1158 }
1159
1160 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1161
1162 if (!zfcp_adapter_multi_buffer_active(adapter))
1163 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1164
1165 ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1166
1167 if (ret)
1168 goto failed_send;
1169
1170 hton24(req->qtcb->bottom.support.d_id, d_id);
1171 req->handler = zfcp_fsf_send_els_handler;
1172 req->data = els;
1173
1174 zfcp_dbf_san_req("fssels1", req, d_id);
1175
1176 ret = zfcp_fsf_req_send(req);
1177 if (ret)
1178 goto failed_send;
1179
1180 goto out;
1181
1182 failed_send:
1183 zfcp_fsf_req_free(req);
1184 out:
1185 spin_unlock_irq(&qdio->req_q_lock);
1186 return ret;
1187 }
1188
1189 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1190 {
1191 struct zfcp_fsf_req *req;
1192 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1193 int retval = -EIO;
1194
1195 spin_lock_irq(&qdio->req_q_lock);
1196 if (zfcp_qdio_sbal_get(qdio))
1197 goto out;
1198
1199 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1200 SBAL_SFLAGS0_TYPE_READ,
1201 qdio->adapter->pool.erp_req);
1202
1203 if (IS_ERR(req)) {
1204 retval = PTR_ERR(req);
1205 goto out;
1206 }
1207
1208 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1209 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1210
1211 req->qtcb->bottom.config.feature_selection =
1212 FSF_FEATURE_CFDC |
1213 FSF_FEATURE_LUN_SHARING |
1214 FSF_FEATURE_NOTIFICATION_LOST |
1215 FSF_FEATURE_UPDATE_ALERT;
1216 req->erp_action = erp_action;
1217 req->handler = zfcp_fsf_exchange_config_data_handler;
1218 erp_action->fsf_req_id = req->req_id;
1219
1220 zfcp_fsf_start_erp_timer(req);
1221 retval = zfcp_fsf_req_send(req);
1222 if (retval) {
1223 zfcp_fsf_req_free(req);
1224 erp_action->fsf_req_id = 0;
1225 }
1226 out:
1227 spin_unlock_irq(&qdio->req_q_lock);
1228 return retval;
1229 }
1230
1231 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1232 struct fsf_qtcb_bottom_config *data)
1233 {
1234 struct zfcp_fsf_req *req = NULL;
1235 int retval = -EIO;
1236
1237 spin_lock_irq(&qdio->req_q_lock);
1238 if (zfcp_qdio_sbal_get(qdio))
1239 goto out_unlock;
1240
1241 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1242 SBAL_SFLAGS0_TYPE_READ, NULL);
1243
1244 if (IS_ERR(req)) {
1245 retval = PTR_ERR(req);
1246 goto out_unlock;
1247 }
1248
1249 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1250 req->handler = zfcp_fsf_exchange_config_data_handler;
1251
1252 req->qtcb->bottom.config.feature_selection =
1253 FSF_FEATURE_CFDC |
1254 FSF_FEATURE_LUN_SHARING |
1255 FSF_FEATURE_NOTIFICATION_LOST |
1256 FSF_FEATURE_UPDATE_ALERT;
1257
1258 if (data)
1259 req->data = data;
1260
1261 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1262 retval = zfcp_fsf_req_send(req);
1263 spin_unlock_irq(&qdio->req_q_lock);
1264 if (!retval)
1265 wait_for_completion(&req->completion);
1266
1267 zfcp_fsf_req_free(req);
1268 return retval;
1269
1270 out_unlock:
1271 spin_unlock_irq(&qdio->req_q_lock);
1272 return retval;
1273 }
1274
1275 /**
1276 * zfcp_fsf_exchange_port_data - request information about local port
1277 * @erp_action: ERP action for the adapter for which port data is requested
1278 * Returns: 0 on success, error otherwise
1279 */
1280 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1281 {
1282 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1283 struct zfcp_fsf_req *req;
1284 int retval = -EIO;
1285
1286 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1287 return -EOPNOTSUPP;
1288
1289 spin_lock_irq(&qdio->req_q_lock);
1290 if (zfcp_qdio_sbal_get(qdio))
1291 goto out;
1292
1293 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1294 SBAL_SFLAGS0_TYPE_READ,
1295 qdio->adapter->pool.erp_req);
1296
1297 if (IS_ERR(req)) {
1298 retval = PTR_ERR(req);
1299 goto out;
1300 }
1301
1302 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1303 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1304
1305 req->handler = zfcp_fsf_exchange_port_data_handler;
1306 req->erp_action = erp_action;
1307 erp_action->fsf_req_id = req->req_id;
1308
1309 zfcp_fsf_start_erp_timer(req);
1310 retval = zfcp_fsf_req_send(req);
1311 if (retval) {
1312 zfcp_fsf_req_free(req);
1313 erp_action->fsf_req_id = 0;
1314 }
1315 out:
1316 spin_unlock_irq(&qdio->req_q_lock);
1317 return retval;
1318 }
1319
1320 /**
1321 * zfcp_fsf_exchange_port_data_sync - request information about local port
1322 * @qdio: pointer to struct zfcp_qdio
1323 * @data: pointer to struct fsf_qtcb_bottom_port
1324 * Returns: 0 on success, error otherwise
1325 */
1326 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1327 struct fsf_qtcb_bottom_port *data)
1328 {
1329 struct zfcp_fsf_req *req = NULL;
1330 int retval = -EIO;
1331
1332 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1333 return -EOPNOTSUPP;
1334
1335 spin_lock_irq(&qdio->req_q_lock);
1336 if (zfcp_qdio_sbal_get(qdio))
1337 goto out_unlock;
1338
1339 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1340 SBAL_SFLAGS0_TYPE_READ, NULL);
1341
1342 if (IS_ERR(req)) {
1343 retval = PTR_ERR(req);
1344 goto out_unlock;
1345 }
1346
1347 if (data)
1348 req->data = data;
1349
1350 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1351
1352 req->handler = zfcp_fsf_exchange_port_data_handler;
1353 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1354 retval = zfcp_fsf_req_send(req);
1355 spin_unlock_irq(&qdio->req_q_lock);
1356
1357 if (!retval)
1358 wait_for_completion(&req->completion);
1359
1360 zfcp_fsf_req_free(req);
1361
1362 return retval;
1363
1364 out_unlock:
1365 spin_unlock_irq(&qdio->req_q_lock);
1366 return retval;
1367 }
1368
1369 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1370 {
1371 struct zfcp_port *port = req->data;
1372 struct fsf_qtcb_header *header = &req->qtcb->header;
1373 struct fc_els_flogi *plogi;
1374
1375 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1376 goto out;
1377
1378 switch (header->fsf_status) {
1379 case FSF_PORT_ALREADY_OPEN:
1380 break;
1381 case FSF_ACCESS_DENIED:
1382 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1383 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1384 break;
1385 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1386 dev_warn(&req->adapter->ccw_device->dev,
1387 "Not enough FCP adapter resources to open "
1388 "remote port 0x%016Lx\n",
1389 (unsigned long long)port->wwpn);
1390 zfcp_erp_set_port_status(port,
1391 ZFCP_STATUS_COMMON_ERP_FAILED);
1392 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1393 break;
1394 case FSF_ADAPTER_STATUS_AVAILABLE:
1395 switch (header->fsf_status_qual.word[0]) {
1396 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1397 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1398 case FSF_SQ_NO_RETRY_POSSIBLE:
1399 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1400 break;
1401 }
1402 break;
1403 case FSF_GOOD:
1404 port->handle = header->port_handle;
1405 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1406 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1407 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1408 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 /* fall through */
1568 case FSF_ACCESS_DENIED:
1569 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1570 break;
1571 case FSF_GOOD:
1572 wka_port->handle = header->port_handle;
1573 /* fall through */
1574 case FSF_PORT_ALREADY_OPEN:
1575 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1576 }
1577 out:
1578 wake_up(&wka_port->completion_wq);
1579 }
1580
1581 /**
1582 * zfcp_fsf_open_wka_port - create and send open wka-port request
1583 * @wka_port: pointer to struct zfcp_fc_wka_port
1584 * Returns: 0 on success, error otherwise
1585 */
1586 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1587 {
1588 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1589 struct zfcp_fsf_req *req;
1590 int retval = -EIO;
1591
1592 spin_lock_irq(&qdio->req_q_lock);
1593 if (zfcp_qdio_sbal_get(qdio))
1594 goto out;
1595
1596 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1597 SBAL_SFLAGS0_TYPE_READ,
1598 qdio->adapter->pool.erp_req);
1599
1600 if (IS_ERR(req)) {
1601 retval = PTR_ERR(req);
1602 goto out;
1603 }
1604
1605 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1606 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1607
1608 req->handler = zfcp_fsf_open_wka_port_handler;
1609 hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1610 req->data = wka_port;
1611
1612 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1613 retval = zfcp_fsf_req_send(req);
1614 if (retval)
1615 zfcp_fsf_req_free(req);
1616 out:
1617 spin_unlock_irq(&qdio->req_q_lock);
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 return retval;
1672 }
1673
1674 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1675 {
1676 struct zfcp_port *port = req->data;
1677 struct fsf_qtcb_header *header = &req->qtcb->header;
1678 struct scsi_device *sdev;
1679
1680 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1681 return;
1682
1683 switch (header->fsf_status) {
1684 case FSF_PORT_HANDLE_NOT_VALID:
1685 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
1686 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1687 break;
1688 case FSF_ACCESS_DENIED:
1689 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1690 break;
1691 case FSF_PORT_BOXED:
1692 /* can't use generic zfcp_erp_modify_port_status because
1693 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1694 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1695 shost_for_each_device(sdev, port->adapter->scsi_host)
1696 if (sdev_to_zfcp(sdev)->port == port)
1697 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1698 &sdev_to_zfcp(sdev)->status);
1699 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1700 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1701 "fscpph2");
1702 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1703 break;
1704 case FSF_ADAPTER_STATUS_AVAILABLE:
1705 switch (header->fsf_status_qual.word[0]) {
1706 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1707 /* fall through */
1708 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1709 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1710 break;
1711 }
1712 break;
1713 case FSF_GOOD:
1714 /* can't use generic zfcp_erp_modify_port_status because
1715 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1716 */
1717 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1718 shost_for_each_device(sdev, port->adapter->scsi_host)
1719 if (sdev_to_zfcp(sdev)->port == port)
1720 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1721 &sdev_to_zfcp(sdev)->status);
1722 break;
1723 }
1724 }
1725
1726 /**
1727 * zfcp_fsf_close_physical_port - close physical port
1728 * @erp_action: pointer to struct zfcp_erp_action
1729 * Returns: 0 on success
1730 */
1731 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1732 {
1733 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1734 struct zfcp_fsf_req *req;
1735 int retval = -EIO;
1736
1737 spin_lock_irq(&qdio->req_q_lock);
1738 if (zfcp_qdio_sbal_get(qdio))
1739 goto out;
1740
1741 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1742 SBAL_SFLAGS0_TYPE_READ,
1743 qdio->adapter->pool.erp_req);
1744
1745 if (IS_ERR(req)) {
1746 retval = PTR_ERR(req);
1747 goto out;
1748 }
1749
1750 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1751 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1752
1753 req->data = erp_action->port;
1754 req->qtcb->header.port_handle = erp_action->port->handle;
1755 req->erp_action = erp_action;
1756 req->handler = zfcp_fsf_close_physical_port_handler;
1757 erp_action->fsf_req_id = req->req_id;
1758
1759 zfcp_fsf_start_erp_timer(req);
1760 retval = zfcp_fsf_req_send(req);
1761 if (retval) {
1762 zfcp_fsf_req_free(req);
1763 erp_action->fsf_req_id = 0;
1764 }
1765 out:
1766 spin_unlock_irq(&qdio->req_q_lock);
1767 return retval;
1768 }
1769
1770 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1771 {
1772 struct zfcp_adapter *adapter = req->adapter;
1773 struct scsi_device *sdev = req->data;
1774 struct zfcp_scsi_dev *zfcp_sdev;
1775 struct fsf_qtcb_header *header = &req->qtcb->header;
1776 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1777
1778 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1779 return;
1780
1781 zfcp_sdev = sdev_to_zfcp(sdev);
1782
1783 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1784 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1785 ZFCP_STATUS_LUN_SHARED |
1786 ZFCP_STATUS_LUN_READONLY,
1787 &zfcp_sdev->status);
1788
1789 switch (header->fsf_status) {
1790
1791 case FSF_PORT_HANDLE_NOT_VALID:
1792 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
1793 /* fall through */
1794 case FSF_LUN_ALREADY_OPEN:
1795 break;
1796 case FSF_ACCESS_DENIED:
1797 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
1798 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1799 break;
1800 case FSF_PORT_BOXED:
1801 zfcp_erp_set_port_status(zfcp_sdev->port,
1802 ZFCP_STATUS_COMMON_ACCESS_BOXED);
1803 zfcp_erp_port_reopen(zfcp_sdev->port,
1804 ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
1805 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1806 break;
1807 case FSF_LUN_SHARING_VIOLATION:
1808 zfcp_cfdc_lun_shrng_vltn(sdev, &header->fsf_status_qual);
1809 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1810 break;
1811 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1812 dev_warn(&adapter->ccw_device->dev,
1813 "No handle is available for LUN "
1814 "0x%016Lx on port 0x%016Lx\n",
1815 (unsigned long long)zfcp_scsi_dev_lun(sdev),
1816 (unsigned long long)zfcp_sdev->port->wwpn);
1817 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1818 /* fall through */
1819 case FSF_INVALID_COMMAND_OPTION:
1820 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1821 break;
1822 case FSF_ADAPTER_STATUS_AVAILABLE:
1823 switch (header->fsf_status_qual.word[0]) {
1824 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1825 zfcp_fc_test_link(zfcp_sdev->port);
1826 /* fall through */
1827 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1828 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1829 break;
1830 }
1831 break;
1832
1833 case FSF_GOOD:
1834 zfcp_sdev->lun_handle = header->lun_handle;
1835 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1836 zfcp_cfdc_open_lun_eval(sdev, bottom);
1837 break;
1838 }
1839 }
1840
1841 /**
1842 * zfcp_fsf_open_lun - open LUN
1843 * @erp_action: pointer to struct zfcp_erp_action
1844 * Returns: 0 on success, error otherwise
1845 */
1846 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1847 {
1848 struct zfcp_adapter *adapter = erp_action->adapter;
1849 struct zfcp_qdio *qdio = adapter->qdio;
1850 struct zfcp_fsf_req *req;
1851 int retval = -EIO;
1852
1853 spin_lock_irq(&qdio->req_q_lock);
1854 if (zfcp_qdio_sbal_get(qdio))
1855 goto out;
1856
1857 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1858 SBAL_SFLAGS0_TYPE_READ,
1859 adapter->pool.erp_req);
1860
1861 if (IS_ERR(req)) {
1862 retval = PTR_ERR(req);
1863 goto out;
1864 }
1865
1866 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1867 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1868
1869 req->qtcb->header.port_handle = erp_action->port->handle;
1870 req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1871 req->handler = zfcp_fsf_open_lun_handler;
1872 req->data = erp_action->sdev;
1873 req->erp_action = erp_action;
1874 erp_action->fsf_req_id = req->req_id;
1875
1876 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1877 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1878
1879 zfcp_fsf_start_erp_timer(req);
1880 retval = zfcp_fsf_req_send(req);
1881 if (retval) {
1882 zfcp_fsf_req_free(req);
1883 erp_action->fsf_req_id = 0;
1884 }
1885 out:
1886 spin_unlock_irq(&qdio->req_q_lock);
1887 return retval;
1888 }
1889
1890 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1891 {
1892 struct scsi_device *sdev = req->data;
1893 struct zfcp_scsi_dev *zfcp_sdev;
1894
1895 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1896 return;
1897
1898 zfcp_sdev = sdev_to_zfcp(sdev);
1899
1900 switch (req->qtcb->header.fsf_status) {
1901 case FSF_PORT_HANDLE_NOT_VALID:
1902 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
1903 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1904 break;
1905 case FSF_LUN_HANDLE_NOT_VALID:
1906 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
1907 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1908 break;
1909 case FSF_PORT_BOXED:
1910 zfcp_erp_set_port_status(zfcp_sdev->port,
1911 ZFCP_STATUS_COMMON_ACCESS_BOXED);
1912 zfcp_erp_port_reopen(zfcp_sdev->port,
1913 ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
1914 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1915 break;
1916 case FSF_ADAPTER_STATUS_AVAILABLE:
1917 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1918 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1919 zfcp_fc_test_link(zfcp_sdev->port);
1920 /* fall through */
1921 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1922 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1923 break;
1924 }
1925 break;
1926 case FSF_GOOD:
1927 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1928 break;
1929 }
1930 }
1931
1932 /**
1933 * zfcp_fsf_close_LUN - close LUN
1934 * @erp_action: pointer to erp_action triggering the "close LUN"
1935 * Returns: 0 on success, error otherwise
1936 */
1937 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
1938 {
1939 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1940 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1941 struct zfcp_fsf_req *req;
1942 int retval = -EIO;
1943
1944 spin_lock_irq(&qdio->req_q_lock);
1945 if (zfcp_qdio_sbal_get(qdio))
1946 goto out;
1947
1948 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1949 SBAL_SFLAGS0_TYPE_READ,
1950 qdio->adapter->pool.erp_req);
1951
1952 if (IS_ERR(req)) {
1953 retval = PTR_ERR(req);
1954 goto out;
1955 }
1956
1957 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1958 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1959
1960 req->qtcb->header.port_handle = erp_action->port->handle;
1961 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1962 req->handler = zfcp_fsf_close_lun_handler;
1963 req->data = erp_action->sdev;
1964 req->erp_action = erp_action;
1965 erp_action->fsf_req_id = req->req_id;
1966
1967 zfcp_fsf_start_erp_timer(req);
1968 retval = zfcp_fsf_req_send(req);
1969 if (retval) {
1970 zfcp_fsf_req_free(req);
1971 erp_action->fsf_req_id = 0;
1972 }
1973 out:
1974 spin_unlock_irq(&qdio->req_q_lock);
1975 return retval;
1976 }
1977
1978 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
1979 {
1980 lat_rec->sum += lat;
1981 lat_rec->min = min(lat_rec->min, lat);
1982 lat_rec->max = max(lat_rec->max, lat);
1983 }
1984
1985 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
1986 {
1987 struct fsf_qual_latency_info *lat_in;
1988 struct latency_cont *lat = NULL;
1989 struct zfcp_scsi_dev *zfcp_sdev;
1990 struct zfcp_blk_drv_data blktrc;
1991 int ticks = req->adapter->timer_ticks;
1992
1993 lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
1994
1995 blktrc.flags = 0;
1996 blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
1997 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1998 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
1999 blktrc.inb_usage = 0;
2000 blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
2001
2002 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
2003 !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2004 zfcp_sdev = sdev_to_zfcp(scsi->device);
2005 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2006 blktrc.channel_lat = lat_in->channel_lat * ticks;
2007 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2008
2009 switch (req->qtcb->bottom.io.data_direction) {
2010 case FSF_DATADIR_DIF_READ_STRIP:
2011 case FSF_DATADIR_DIF_READ_CONVERT:
2012 case FSF_DATADIR_READ:
2013 lat = &zfcp_sdev->latencies.read;
2014 break;
2015 case FSF_DATADIR_DIF_WRITE_INSERT:
2016 case FSF_DATADIR_DIF_WRITE_CONVERT:
2017 case FSF_DATADIR_WRITE:
2018 lat = &zfcp_sdev->latencies.write;
2019 break;
2020 case FSF_DATADIR_CMND:
2021 lat = &zfcp_sdev->latencies.cmd;
2022 break;
2023 }
2024
2025 if (lat) {
2026 spin_lock(&zfcp_sdev->latencies.lock);
2027 zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2028 zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2029 lat->counter++;
2030 spin_unlock(&zfcp_sdev->latencies.lock);
2031 }
2032 }
2033
2034 blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2035 sizeof(blktrc));
2036 }
2037
2038 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
2039 {
2040 struct scsi_cmnd *scmnd = req->data;
2041 struct scsi_device *sdev = scmnd->device;
2042 struct zfcp_scsi_dev *zfcp_sdev;
2043 struct fsf_qtcb_header *header = &req->qtcb->header;
2044
2045 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2046 return;
2047
2048 zfcp_sdev = sdev_to_zfcp(sdev);
2049
2050 switch (header->fsf_status) {
2051 case FSF_HANDLE_MISMATCH:
2052 case FSF_PORT_HANDLE_NOT_VALID:
2053 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1");
2054 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2055 break;
2056 case FSF_FCPLUN_NOT_VALID:
2057 case FSF_LUN_HANDLE_NOT_VALID:
2058 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2059 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2060 break;
2061 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2062 zfcp_fsf_class_not_supp(req);
2063 break;
2064 case FSF_ACCESS_DENIED:
2065 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
2066 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2067 break;
2068 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2069 dev_err(&req->adapter->ccw_device->dev,
2070 "Incorrect direction %d, LUN 0x%016Lx on port "
2071 "0x%016Lx closed\n",
2072 req->qtcb->bottom.io.data_direction,
2073 (unsigned long long)zfcp_scsi_dev_lun(sdev),
2074 (unsigned long long)zfcp_sdev->port->wwpn);
2075 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2076 "fssfch3");
2077 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2078 break;
2079 case FSF_CMND_LENGTH_NOT_VALID:
2080 dev_err(&req->adapter->ccw_device->dev,
2081 "Incorrect CDB length %d, LUN 0x%016Lx on "
2082 "port 0x%016Lx closed\n",
2083 req->qtcb->bottom.io.fcp_cmnd_length,
2084 (unsigned long long)zfcp_scsi_dev_lun(sdev),
2085 (unsigned long long)zfcp_sdev->port->wwpn);
2086 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2087 "fssfch4");
2088 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2089 break;
2090 case FSF_PORT_BOXED:
2091 zfcp_erp_set_port_status(zfcp_sdev->port,
2092 ZFCP_STATUS_COMMON_ACCESS_BOXED);
2093 zfcp_erp_port_reopen(zfcp_sdev->port,
2094 ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2095 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2096 break;
2097 case FSF_LUN_BOXED:
2098 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2099 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2100 "fssfch6");
2101 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2102 break;
2103 case FSF_ADAPTER_STATUS_AVAILABLE:
2104 if (header->fsf_status_qual.word[0] ==
2105 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2106 zfcp_fc_test_link(zfcp_sdev->port);
2107 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2108 break;
2109 }
2110 }
2111
2112 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2113 {
2114 struct scsi_cmnd *scpnt;
2115 struct fcp_resp_with_ext *fcp_rsp;
2116 unsigned long flags;
2117
2118 read_lock_irqsave(&req->adapter->abort_lock, flags);
2119
2120 scpnt = req->data;
2121 if (unlikely(!scpnt)) {
2122 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2123 return;
2124 }
2125
2126 zfcp_fsf_fcp_handler_common(req);
2127
2128 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2129 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2130 goto skip_fsfstatus;
2131 }
2132
2133 switch (req->qtcb->header.fsf_status) {
2134 case FSF_INCONSISTENT_PROT_DATA:
2135 case FSF_INVALID_PROT_PARM:
2136 set_host_byte(scpnt, DID_ERROR);
2137 goto skip_fsfstatus;
2138 case FSF_BLOCK_GUARD_CHECK_FAILURE:
2139 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2140 goto skip_fsfstatus;
2141 case FSF_APP_TAG_CHECK_FAILURE:
2142 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2143 goto skip_fsfstatus;
2144 case FSF_REF_TAG_CHECK_FAILURE:
2145 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2146 goto skip_fsfstatus;
2147 }
2148 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2149 zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2150
2151 skip_fsfstatus:
2152 zfcp_fsf_req_trace(req, scpnt);
2153 zfcp_dbf_scsi_result(scpnt, req);
2154
2155 scpnt->host_scribble = NULL;
2156 (scpnt->scsi_done) (scpnt);
2157 /*
2158 * We must hold this lock until scsi_done has been called.
2159 * Otherwise we may call scsi_done after abort regarding this
2160 * command has completed.
2161 * Note: scsi_done must not block!
2162 */
2163 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2164 }
2165
2166 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2167 {
2168 switch (scsi_get_prot_op(scsi_cmnd)) {
2169 case SCSI_PROT_NORMAL:
2170 switch (scsi_cmnd->sc_data_direction) {
2171 case DMA_NONE:
2172 *data_dir = FSF_DATADIR_CMND;
2173 break;
2174 case DMA_FROM_DEVICE:
2175 *data_dir = FSF_DATADIR_READ;
2176 break;
2177 case DMA_TO_DEVICE:
2178 *data_dir = FSF_DATADIR_WRITE;
2179 break;
2180 case DMA_BIDIRECTIONAL:
2181 return -EINVAL;
2182 }
2183 break;
2184
2185 case SCSI_PROT_READ_STRIP:
2186 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2187 break;
2188 case SCSI_PROT_WRITE_INSERT:
2189 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2190 break;
2191 case SCSI_PROT_READ_PASS:
2192 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2193 break;
2194 case SCSI_PROT_WRITE_PASS:
2195 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2196 break;
2197 default:
2198 return -EINVAL;
2199 }
2200
2201 return 0;
2202 }
2203
2204 /**
2205 * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2206 * @scsi_cmnd: scsi command to be sent
2207 */
2208 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2209 {
2210 struct zfcp_fsf_req *req;
2211 struct fcp_cmnd *fcp_cmnd;
2212 u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
2213 int retval = -EIO;
2214 struct scsi_device *sdev = scsi_cmnd->device;
2215 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2216 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2217 struct zfcp_qdio *qdio = adapter->qdio;
2218 struct fsf_qtcb_bottom_io *io;
2219 unsigned long flags;
2220
2221 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2222 ZFCP_STATUS_COMMON_UNBLOCKED)))
2223 return -EBUSY;
2224
2225 spin_lock_irqsave(&qdio->req_q_lock, flags);
2226 if (atomic_read(&qdio->req_q_free) <= 0) {
2227 atomic_inc(&qdio->req_q_full);
2228 goto out;
2229 }
2230
2231 if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2232 sbtype = SBAL_SFLAGS0_TYPE_WRITE;
2233
2234 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2235 sbtype, adapter->pool.scsi_req);
2236
2237 if (IS_ERR(req)) {
2238 retval = PTR_ERR(req);
2239 goto out;
2240 }
2241
2242 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2243
2244 io = &req->qtcb->bottom.io;
2245 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2246 req->data = scsi_cmnd;
2247 req->handler = zfcp_fsf_fcp_cmnd_handler;
2248 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2249 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2250 io->service_class = FSF_CLASS_3;
2251 io->fcp_cmnd_length = FCP_CMND_LEN;
2252
2253 if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2254 io->data_block_length = scsi_cmnd->device->sector_size;
2255 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2256 }
2257
2258 if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction))
2259 goto failed_scsi_cmnd;
2260
2261 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2262 zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd, 0);
2263
2264 if (scsi_prot_sg_count(scsi_cmnd)) {
2265 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2266 scsi_prot_sg_count(scsi_cmnd));
2267 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2268 scsi_prot_sglist(scsi_cmnd));
2269 if (retval)
2270 goto failed_scsi_cmnd;
2271 io->prot_data_length = zfcp_qdio_real_bytes(
2272 scsi_prot_sglist(scsi_cmnd));
2273 }
2274
2275 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2276 scsi_sglist(scsi_cmnd));
2277 if (unlikely(retval))
2278 goto failed_scsi_cmnd;
2279
2280 zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2281 if (zfcp_adapter_multi_buffer_active(adapter))
2282 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2283
2284 retval = zfcp_fsf_req_send(req);
2285 if (unlikely(retval))
2286 goto failed_scsi_cmnd;
2287
2288 goto out;
2289
2290 failed_scsi_cmnd:
2291 zfcp_fsf_req_free(req);
2292 scsi_cmnd->host_scribble = NULL;
2293 out:
2294 spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2295 return retval;
2296 }
2297
2298 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2299 {
2300 struct fcp_resp_with_ext *fcp_rsp;
2301 struct fcp_resp_rsp_info *rsp_info;
2302
2303 zfcp_fsf_fcp_handler_common(req);
2304
2305 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2306 rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2307
2308 if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2309 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2310 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2311 }
2312
2313 /**
2314 * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
2315 * @scmnd: SCSI command to send the task management command for
2316 * @tm_flags: unsigned byte for task management flags
2317 * Returns: on success pointer to struct fsf_req, NULL otherwise
2318 */
2319 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
2320 u8 tm_flags)
2321 {
2322 struct zfcp_fsf_req *req = NULL;
2323 struct fcp_cmnd *fcp_cmnd;
2324 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
2325 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2326
2327 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2328 ZFCP_STATUS_COMMON_UNBLOCKED)))
2329 return NULL;
2330
2331 spin_lock_irq(&qdio->req_q_lock);
2332 if (zfcp_qdio_sbal_get(qdio))
2333 goto out;
2334
2335 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2336 SBAL_SFLAGS0_TYPE_WRITE,
2337 qdio->adapter->pool.scsi_req);
2338
2339 if (IS_ERR(req)) {
2340 req = NULL;
2341 goto out;
2342 }
2343
2344 req->data = scmnd;
2345 req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2346 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2347 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2348 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2349 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2350 req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2351
2352 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2353
2354 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2355 zfcp_fc_scsi_to_fcp(fcp_cmnd, scmnd, tm_flags);
2356
2357 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2358 if (!zfcp_fsf_req_send(req))
2359 goto out;
2360
2361 zfcp_fsf_req_free(req);
2362 req = NULL;
2363 out:
2364 spin_unlock_irq(&qdio->req_q_lock);
2365 return req;
2366 }
2367
2368 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2369 {
2370 }
2371
2372 /**
2373 * zfcp_fsf_control_file - control file upload/download
2374 * @adapter: pointer to struct zfcp_adapter
2375 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2376 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2377 */
2378 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2379 struct zfcp_fsf_cfdc *fsf_cfdc)
2380 {
2381 struct zfcp_qdio *qdio = adapter->qdio;
2382 struct zfcp_fsf_req *req = NULL;
2383 struct fsf_qtcb_bottom_support *bottom;
2384 int retval = -EIO;
2385 u8 direction;
2386
2387 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2388 return ERR_PTR(-EOPNOTSUPP);
2389
2390 switch (fsf_cfdc->command) {
2391 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2392 direction = SBAL_SFLAGS0_TYPE_WRITE;
2393 break;
2394 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2395 direction = SBAL_SFLAGS0_TYPE_READ;
2396 break;
2397 default:
2398 return ERR_PTR(-EINVAL);
2399 }
2400
2401 spin_lock_irq(&qdio->req_q_lock);
2402 if (zfcp_qdio_sbal_get(qdio))
2403 goto out;
2404
2405 req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, direction, NULL);
2406 if (IS_ERR(req)) {
2407 retval = -EPERM;
2408 goto out;
2409 }
2410
2411 req->handler = zfcp_fsf_control_file_handler;
2412
2413 bottom = &req->qtcb->bottom.support;
2414 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2415 bottom->option = fsf_cfdc->option;
2416
2417 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, fsf_cfdc->sg);
2418
2419 if (retval ||
2420 (zfcp_qdio_real_bytes(fsf_cfdc->sg) != ZFCP_CFDC_MAX_SIZE)) {
2421 zfcp_fsf_req_free(req);
2422 retval = -EIO;
2423 goto out;
2424 }
2425 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2426 if (zfcp_adapter_multi_buffer_active(adapter))
2427 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2428
2429 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2430 retval = zfcp_fsf_req_send(req);
2431 out:
2432 spin_unlock_irq(&qdio->req_q_lock);
2433
2434 if (!retval) {
2435 wait_for_completion(&req->completion);
2436 return req;
2437 }
2438 return ERR_PTR(retval);
2439 }
2440
2441 /**
2442 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2443 * @adapter: pointer to struct zfcp_adapter
2444 * @sbal_idx: response queue index of SBAL to be processed
2445 */
2446 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2447 {
2448 struct zfcp_adapter *adapter = qdio->adapter;
2449 struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2450 struct qdio_buffer_element *sbale;
2451 struct zfcp_fsf_req *fsf_req;
2452 unsigned long req_id;
2453 int idx;
2454
2455 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2456
2457 sbale = &sbal->element[idx];
2458 req_id = (unsigned long) sbale->addr;
2459 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2460
2461 if (!fsf_req) {
2462 /*
2463 * Unknown request means that we have potentially memory
2464 * corruption and must stop the machine immediately.
2465 */
2466 zfcp_qdio_siosl(adapter);
2467 panic("error: unknown req_id (%lx) on adapter %s.\n",
2468 req_id, dev_name(&adapter->ccw_device->dev));
2469 }
2470
2471 fsf_req->qdio_req.sbal_response = sbal_idx;
2472 zfcp_fsf_req_complete(fsf_req);
2473
2474 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
2475 break;
2476 }
2477 }
2478
2479 struct zfcp_fsf_req *zfcp_fsf_get_req(struct zfcp_qdio *qdio,
2480 struct qdio_buffer *sbal)
2481 {
2482 struct qdio_buffer_element *sbale = &sbal->element[0];
2483 u64 req_id = (unsigned long) sbale->addr;
2484
2485 return zfcp_reqlist_find(qdio->adapter->req_list, req_id);
2486 }
Linux 2.6 libata-dev (mirror)