1 /*
2 * zfcp device driver
3 *
4 * Implementation of FSF commands.
5 *
6 * Copyright IBM Corporation 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
zfcp_fsf_request_timeout_handler(unsigned long data)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
zfcp_fsf_start_timer(struct zfcp_fsf_req * fsf_req,unsigned long timeout)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
zfcp_fsf_start_erp_timer(struct zfcp_fsf_req * fsf_req)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
zfcp_fsf_class_not_supp(struct zfcp_fsf_req * req)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 */
zfcp_fsf_req_free(struct zfcp_fsf_req * req)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
zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req * req)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
zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req * req,struct fsf_link_down_info * link_down)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
zfcp_fsf_status_read_link_down(struct zfcp_fsf_req * req)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
zfcp_fsf_status_read_handler(struct zfcp_fsf_req * req)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_2", 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 queue_work(adapter->work_queue, &adapter->scan_work);
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
zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req * req)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
zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req * req)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
zfcp_fsf_protstatus_eval(struct zfcp_fsf_req * req)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 */
zfcp_fsf_req_complete(struct zfcp_fsf_req * req)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 */
zfcp_fsf_req_dismiss_all(struct zfcp_adapter * adapter)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
zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req * req)440 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
441 {
442 struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
443 struct zfcp_adapter *adapter = req->adapter;
444 struct Scsi_Host *shost = adapter->scsi_host;
445 struct fc_els_flogi *nsp, *plogi;
446
447 /* adjust pointers for missing command code */
448 nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
449 - sizeof(u32));
450 plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
451 - sizeof(u32));
452
453 if (req->data)
454 memcpy(req->data, bottom, sizeof(*bottom));
455
456 fc_host_port_name(shost) = nsp->fl_wwpn;
457 fc_host_node_name(shost) = nsp->fl_wwnn;
458 fc_host_port_id(shost) = ntoh24(bottom->s_id);
459 fc_host_speed(shost) = bottom->fc_link_speed;
460 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
461
462 adapter->hydra_version = bottom->adapter_type;
463 adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK;
464 adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
465 (u16)FSF_STATUS_READS_RECOM);
466
467 if (fc_host_permanent_port_name(shost) == -1)
468 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
469
470 switch (bottom->fc_topology) {
471 case FSF_TOPO_P2P:
472 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
473 adapter->peer_wwpn = plogi->fl_wwpn;
474 adapter->peer_wwnn = plogi->fl_wwnn;
475 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
476 break;
477 case FSF_TOPO_FABRIC:
478 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
479 break;
480 case FSF_TOPO_AL:
481 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
482 /* fall through */
483 default:
484 dev_err(&adapter->ccw_device->dev,
485 "Unknown or unsupported arbitrated loop "
486 "fibre channel topology detected\n");
487 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1");
488 return -EIO;
489 }
490
491 zfcp_scsi_set_prot(adapter);
492
493 return 0;
494 }
495
zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req * req)496 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
497 {
498 struct zfcp_adapter *adapter = req->adapter;
499 struct fsf_qtcb *qtcb = req->qtcb;
500 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
501 struct Scsi_Host *shost = adapter->scsi_host;
502
503 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
504 return;
505
506 adapter->fsf_lic_version = bottom->lic_version;
507 adapter->adapter_features = bottom->adapter_features;
508 adapter->connection_features = bottom->connection_features;
509 adapter->peer_wwpn = 0;
510 adapter->peer_wwnn = 0;
511 adapter->peer_d_id = 0;
512
513 switch (qtcb->header.fsf_status) {
514 case FSF_GOOD:
515 if (zfcp_fsf_exchange_config_evaluate(req))
516 return;
517
518 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
519 dev_err(&adapter->ccw_device->dev,
520 "FCP adapter maximum QTCB size (%d bytes) "
521 "is too small\n",
522 bottom->max_qtcb_size);
523 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1");
524 return;
525 }
526 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
527 &adapter->status);
528 break;
529 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
530 fc_host_node_name(shost) = 0;
531 fc_host_port_name(shost) = 0;
532 fc_host_port_id(shost) = 0;
533 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
534 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
535 adapter->hydra_version = 0;
536
537 zfcp_fsf_link_down_info_eval(req,
538 &qtcb->header.fsf_status_qual.link_down_info);
539 break;
540 default:
541 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
542 return;
543 }
544
545 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
546 adapter->hardware_version = bottom->hardware_version;
547 memcpy(fc_host_serial_number(shost), bottom->serial_number,
548 min(FC_SERIAL_NUMBER_SIZE, 17));
549 EBCASC(fc_host_serial_number(shost),
550 min(FC_SERIAL_NUMBER_SIZE, 17));
551 }
552
553 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
554 dev_err(&adapter->ccw_device->dev,
555 "The FCP adapter only supports newer "
556 "control block versions\n");
557 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4");
558 return;
559 }
560 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
561 dev_err(&adapter->ccw_device->dev,
562 "The FCP adapter only supports older "
563 "control block versions\n");
564 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5");
565 }
566 }
567
zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req * req)568 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
569 {
570 struct zfcp_adapter *adapter = req->adapter;
571 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
572 struct Scsi_Host *shost = adapter->scsi_host;
573
574 if (req->data)
575 memcpy(req->data, bottom, sizeof(*bottom));
576
577 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
578 fc_host_permanent_port_name(shost) = bottom->wwpn;
579 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
580 } else
581 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
582 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
583 fc_host_supported_speeds(shost) = bottom->supported_speed;
584 memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
585 FC_FC4_LIST_SIZE);
586 memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
587 FC_FC4_LIST_SIZE);
588 }
589
zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req * req)590 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
591 {
592 struct fsf_qtcb *qtcb = req->qtcb;
593
594 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
595 return;
596
597 switch (qtcb->header.fsf_status) {
598 case FSF_GOOD:
599 zfcp_fsf_exchange_port_evaluate(req);
600 break;
601 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
602 zfcp_fsf_exchange_port_evaluate(req);
603 zfcp_fsf_link_down_info_eval(req,
604 &qtcb->header.fsf_status_qual.link_down_info);
605 break;
606 }
607 }
608
zfcp_fsf_alloc(mempool_t * pool)609 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
610 {
611 struct zfcp_fsf_req *req;
612
613 if (likely(pool))
614 req = mempool_alloc(pool, GFP_ATOMIC);
615 else
616 req = kmalloc(sizeof(*req), GFP_ATOMIC);
617
618 if (unlikely(!req))
619 return NULL;
620
621 memset(req, 0, sizeof(*req));
622 req->pool = pool;
623 return req;
624 }
625
zfcp_qtcb_alloc(mempool_t * pool)626 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
627 {
628 struct fsf_qtcb *qtcb;
629
630 if (likely(pool))
631 qtcb = mempool_alloc(pool, GFP_ATOMIC);
632 else
633 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
634
635 if (unlikely(!qtcb))
636 return NULL;
637
638 memset(qtcb, 0, sizeof(*qtcb));
639 return qtcb;
640 }
641
zfcp_fsf_req_create(struct zfcp_qdio * qdio,u32 fsf_cmd,u32 sbtype,mempool_t * pool)642 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
643 u32 fsf_cmd, u32 sbtype,
644 mempool_t *pool)
645 {
646 struct zfcp_adapter *adapter = qdio->adapter;
647 struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
648
649 if (unlikely(!req))
650 return ERR_PTR(-ENOMEM);
651
652 if (adapter->req_no == 0)
653 adapter->req_no++;
654
655 INIT_LIST_HEAD(&req->list);
656 init_timer(&req->timer);
657 init_completion(&req->completion);
658
659 req->adapter = adapter;
660 req->fsf_command = fsf_cmd;
661 req->req_id = adapter->req_no;
662
663 if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
664 if (likely(pool))
665 req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
666 else
667 req->qtcb = zfcp_qtcb_alloc(NULL);
668
669 if (unlikely(!req->qtcb)) {
670 zfcp_fsf_req_free(req);
671 return ERR_PTR(-ENOMEM);
672 }
673
674 req->seq_no = adapter->fsf_req_seq_no;
675 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
676 req->qtcb->prefix.req_id = req->req_id;
677 req->qtcb->prefix.ulp_info = 26;
678 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
679 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
680 req->qtcb->header.req_handle = req->req_id;
681 req->qtcb->header.fsf_command = req->fsf_command;
682 }
683
684 zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
685 req->qtcb, sizeof(struct fsf_qtcb));
686
687 return req;
688 }
689
zfcp_fsf_req_send(struct zfcp_fsf_req * req)690 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
691 {
692 struct zfcp_adapter *adapter = req->adapter;
693 struct zfcp_qdio *qdio = adapter->qdio;
694 int with_qtcb = (req->qtcb != NULL);
695 int req_id = req->req_id;
696
697 zfcp_reqlist_add(adapter->req_list, req);
698
699 req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
700 req->issued = get_clock();
701 if (zfcp_qdio_send(qdio, &req->qdio_req)) {
702 del_timer(&req->timer);
703 /* lookup request again, list might have changed */
704 zfcp_reqlist_find_rm(adapter->req_list, req_id);
705 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
706 return -EIO;
707 }
708
709 /* Don't increase for unsolicited status */
710 if (with_qtcb)
711 adapter->fsf_req_seq_no++;
712 adapter->req_no++;
713
714 return 0;
715 }
716
717 /**
718 * zfcp_fsf_status_read - send status read request
719 * @adapter: pointer to struct zfcp_adapter
720 * @req_flags: request flags
721 * Returns: 0 on success, ERROR otherwise
722 */
zfcp_fsf_status_read(struct zfcp_qdio * qdio)723 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
724 {
725 struct zfcp_adapter *adapter = qdio->adapter;
726 struct zfcp_fsf_req *req;
727 struct fsf_status_read_buffer *sr_buf;
728 struct page *page;
729 int retval = -EIO;
730
731 spin_lock_irq(&qdio->req_q_lock);
732 if (zfcp_qdio_sbal_get(qdio))
733 goto out;
734
735 req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS, 0,
736 adapter->pool.status_read_req);
737 if (IS_ERR(req)) {
738 retval = PTR_ERR(req);
739 goto out;
740 }
741
742 page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
743 if (!page) {
744 retval = -ENOMEM;
745 goto failed_buf;
746 }
747 sr_buf = page_address(page);
748 memset(sr_buf, 0, sizeof(*sr_buf));
749 req->data = sr_buf;
750
751 zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
752 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
753
754 retval = zfcp_fsf_req_send(req);
755 if (retval)
756 goto failed_req_send;
757
758 goto out;
759
760 failed_req_send:
761 req->data = NULL;
762 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
763 failed_buf:
764 zfcp_dbf_hba_fsf_uss("fssr__1", req);
765 zfcp_fsf_req_free(req);
766 out:
767 spin_unlock_irq(&qdio->req_q_lock);
768 return retval;
769 }
770
zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req * req)771 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
772 {
773 struct scsi_device *sdev = req->data;
774 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
775 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
776
777 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
778 return;
779
780 switch (req->qtcb->header.fsf_status) {
781 case FSF_PORT_HANDLE_NOT_VALID:
782 if (fsq->word[0] == fsq->word[1]) {
783 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
784 "fsafch1");
785 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
786 }
787 break;
788 case FSF_LUN_HANDLE_NOT_VALID:
789 if (fsq->word[0] == fsq->word[1]) {
790 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
791 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
792 }
793 break;
794 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
795 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
796 break;
797 case FSF_PORT_BOXED:
798 zfcp_erp_set_port_status(zfcp_sdev->port,
799 ZFCP_STATUS_COMMON_ACCESS_BOXED);
800 zfcp_erp_port_reopen(zfcp_sdev->port,
801 ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
802 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
803 break;
804 case FSF_LUN_BOXED:
805 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
806 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
807 "fsafch4");
808 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
809 break;
810 case FSF_ADAPTER_STATUS_AVAILABLE:
811 switch (fsq->word[0]) {
812 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
813 zfcp_fc_test_link(zfcp_sdev->port);
814 /* fall through */
815 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
816 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
817 break;
818 }
819 break;
820 case FSF_GOOD:
821 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
822 break;
823 }
824 }
825
826 /**
827 * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
828 * @scmnd: The SCSI command to abort
829 * Returns: pointer to struct zfcp_fsf_req
830 */
831
zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd * scmnd)832 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
833 {
834 struct zfcp_fsf_req *req = NULL;
835 struct scsi_device *sdev = scmnd->device;
836 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
837 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
838 unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
839
840 spin_lock_irq(&qdio->req_q_lock);
841 if (zfcp_qdio_sbal_get(qdio))
842 goto out;
843 req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
844 SBAL_FLAGS0_TYPE_READ,
845 qdio->adapter->pool.scsi_abort);
846 if (IS_ERR(req)) {
847 req = NULL;
848 goto out;
849 }
850
851 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
852 ZFCP_STATUS_COMMON_UNBLOCKED)))
853 goto out_error_free;
854
855 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
856
857 req->data = sdev;
858 req->handler = zfcp_fsf_abort_fcp_command_handler;
859 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
860 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
861 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
862
863 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
864 if (!zfcp_fsf_req_send(req))
865 goto out;
866
867 out_error_free:
868 zfcp_fsf_req_free(req);
869 req = NULL;
870 out:
871 spin_unlock_irq(&qdio->req_q_lock);
872 return req;
873 }
874
zfcp_fsf_send_ct_handler(struct zfcp_fsf_req * req)875 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
876 {
877 struct zfcp_adapter *adapter = req->adapter;
878 struct zfcp_fsf_ct_els *ct = req->data;
879 struct fsf_qtcb_header *header = &req->qtcb->header;
880
881 ct->status = -EINVAL;
882
883 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
884 goto skip_fsfstatus;
885
886 switch (header->fsf_status) {
887 case FSF_GOOD:
888 zfcp_dbf_san_res("fsscth1", req);
889 ct->status = 0;
890 break;
891 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
892 zfcp_fsf_class_not_supp(req);
893 break;
894 case FSF_ADAPTER_STATUS_AVAILABLE:
895 switch (header->fsf_status_qual.word[0]){
896 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
897 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
898 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
899 break;
900 }
901 break;
902 case FSF_ACCESS_DENIED:
903 break;
904 case FSF_PORT_BOXED:
905 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
906 break;
907 case FSF_PORT_HANDLE_NOT_VALID:
908 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
909 /* fall through */
910 case FSF_GENERIC_COMMAND_REJECTED:
911 case FSF_PAYLOAD_SIZE_MISMATCH:
912 case FSF_REQUEST_SIZE_TOO_LARGE:
913 case FSF_RESPONSE_SIZE_TOO_LARGE:
914 case FSF_SBAL_MISMATCH:
915 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
916 break;
917 }
918
919 skip_fsfstatus:
920 if (ct->handler)
921 ct->handler(ct->handler_data);
922 }
923
zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio * qdio,struct zfcp_qdio_req * q_req,struct scatterlist * sg_req,struct scatterlist * sg_resp)924 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
925 struct zfcp_qdio_req *q_req,
926 struct scatterlist *sg_req,
927 struct scatterlist *sg_resp)
928 {
929 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
930 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
931 zfcp_qdio_set_sbale_last(qdio, q_req);
932 }
933
zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req * req,struct scatterlist * sg_req,struct scatterlist * sg_resp)934 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
935 struct scatterlist *sg_req,
936 struct scatterlist *sg_resp)
937 {
938 struct zfcp_adapter *adapter = req->adapter;
939 u32 feat = adapter->adapter_features;
940 int bytes;
941
942 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
943 if (!zfcp_qdio_sg_one_sbale(sg_req) ||
944 !zfcp_qdio_sg_one_sbale(sg_resp))
945 return -EOPNOTSUPP;
946
947 zfcp_fsf_setup_ct_els_unchained(adapter->qdio, &req->qdio_req,
948 sg_req, sg_resp);
949 return 0;
950 }
951
952 /* use single, unchained SBAL if it can hold the request */
953 if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
954 zfcp_fsf_setup_ct_els_unchained(adapter->qdio, &req->qdio_req,
955 sg_req, sg_resp);
956 return 0;
957 }
958
959 bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req, sg_req);
960 if (bytes <= 0)
961 return -EIO;
962 zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
963 req->qtcb->bottom.support.req_buf_length = bytes;
964 zfcp_qdio_skip_to_last_sbale(&req->qdio_req);
965
966 bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req,
967 sg_resp);
968 req->qtcb->bottom.support.resp_buf_length = bytes;
969 if (bytes <= 0)
970 return -EIO;
971 zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
972
973 return 0;
974 }
975
zfcp_fsf_setup_ct_els(struct zfcp_fsf_req * req,struct scatterlist * sg_req,struct scatterlist * sg_resp,unsigned int timeout)976 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
977 struct scatterlist *sg_req,
978 struct scatterlist *sg_resp,
979 unsigned int timeout)
980 {
981 int ret;
982
983 ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
984 if (ret)
985 return ret;
986
987 /* common settings for ct/gs and els requests */
988 if (timeout > 255)
989 timeout = 255; /* max value accepted by hardware */
990 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
991 req->qtcb->bottom.support.timeout = timeout;
992 zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
993
994 return 0;
995 }
996
997 /**
998 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
999 * @ct: pointer to struct zfcp_send_ct with data for request
1000 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1001 */
zfcp_fsf_send_ct(struct zfcp_fc_wka_port * wka_port,struct zfcp_fsf_ct_els * ct,mempool_t * pool,unsigned int timeout)1002 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1003 struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1004 unsigned int timeout)
1005 {
1006 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1007 struct zfcp_fsf_req *req;
1008 int ret = -EIO;
1009
1010 spin_lock_irq(&qdio->req_q_lock);
1011 if (zfcp_qdio_sbal_get(qdio))
1012 goto out;
1013
1014 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1015 SBAL_FLAGS0_TYPE_WRITE_READ, pool);
1016
1017 if (IS_ERR(req)) {
1018 ret = PTR_ERR(req);
1019 goto out;
1020 }
1021
1022 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1023 ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1024 if (ret)
1025 goto failed_send;
1026
1027 req->handler = zfcp_fsf_send_ct_handler;
1028 req->qtcb->header.port_handle = wka_port->handle;
1029 req->data = ct;
1030
1031 zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1032
1033 ret = zfcp_fsf_req_send(req);
1034 if (ret)
1035 goto failed_send;
1036
1037 goto out;
1038
1039 failed_send:
1040 zfcp_fsf_req_free(req);
1041 out:
1042 spin_unlock_irq(&qdio->req_q_lock);
1043 return ret;
1044 }
1045
zfcp_fsf_send_els_handler(struct zfcp_fsf_req * req)1046 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1047 {
1048 struct zfcp_fsf_ct_els *send_els = req->data;
1049 struct zfcp_port *port = send_els->port;
1050 struct fsf_qtcb_header *header = &req->qtcb->header;
1051
1052 send_els->status = -EINVAL;
1053
1054 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1055 goto skip_fsfstatus;
1056
1057 switch (header->fsf_status) {
1058 case FSF_GOOD:
1059 zfcp_dbf_san_res("fsselh1", req);
1060 send_els->status = 0;
1061 break;
1062 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1063 zfcp_fsf_class_not_supp(req);
1064 break;
1065 case FSF_ADAPTER_STATUS_AVAILABLE:
1066 switch (header->fsf_status_qual.word[0]){
1067 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1068 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1069 case FSF_SQ_RETRY_IF_POSSIBLE:
1070 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1071 break;
1072 }
1073 break;
1074 case FSF_ELS_COMMAND_REJECTED:
1075 case FSF_PAYLOAD_SIZE_MISMATCH:
1076 case FSF_REQUEST_SIZE_TOO_LARGE:
1077 case FSF_RESPONSE_SIZE_TOO_LARGE:
1078 break;
1079 case FSF_ACCESS_DENIED:
1080 if (port) {
1081 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1082 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1083 }
1084 break;
1085 case FSF_SBAL_MISMATCH:
1086 /* should never occur, avoided in zfcp_fsf_send_els */
1087 /* fall through */
1088 default:
1089 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1090 break;
1091 }
1092 skip_fsfstatus:
1093 if (send_els->handler)
1094 send_els->handler(send_els->handler_data);
1095 }
1096
1097 /**
1098 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1099 * @els: pointer to struct zfcp_send_els with data for the command
1100 */
zfcp_fsf_send_els(struct zfcp_adapter * adapter,u32 d_id,struct zfcp_fsf_ct_els * els,unsigned int timeout)1101 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1102 struct zfcp_fsf_ct_els *els, unsigned int timeout)
1103 {
1104 struct zfcp_fsf_req *req;
1105 struct zfcp_qdio *qdio = adapter->qdio;
1106 int ret = -EIO;
1107
1108 spin_lock_irq(&qdio->req_q_lock);
1109 if (zfcp_qdio_sbal_get(qdio))
1110 goto out;
1111
1112 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1113 SBAL_FLAGS0_TYPE_WRITE_READ, NULL);
1114
1115 if (IS_ERR(req)) {
1116 ret = PTR_ERR(req);
1117 goto out;
1118 }
1119
1120 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1121
1122 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1123
1124 ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1125
1126 if (ret)
1127 goto failed_send;
1128
1129 hton24(req->qtcb->bottom.support.d_id, d_id);
1130 req->handler = zfcp_fsf_send_els_handler;
1131 req->data = els;
1132
1133 zfcp_dbf_san_req("fssels1", req, d_id);
1134
1135 ret = zfcp_fsf_req_send(req);
1136 if (ret)
1137 goto failed_send;
1138
1139 goto out;
1140
1141 failed_send:
1142 zfcp_fsf_req_free(req);
1143 out:
1144 spin_unlock_irq(&qdio->req_q_lock);
1145 return ret;
1146 }
1147
zfcp_fsf_exchange_config_data(struct zfcp_erp_action * erp_action)1148 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1149 {
1150 struct zfcp_fsf_req *req;
1151 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1152 int retval = -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_EXCHANGE_CONFIG_DATA,
1159 SBAL_FLAGS0_TYPE_READ,
1160 qdio->adapter->pool.erp_req);
1161
1162 if (IS_ERR(req)) {
1163 retval = PTR_ERR(req);
1164 goto out;
1165 }
1166
1167 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1168 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1169
1170 req->qtcb->bottom.config.feature_selection =
1171 FSF_FEATURE_CFDC |
1172 FSF_FEATURE_LUN_SHARING |
1173 FSF_FEATURE_NOTIFICATION_LOST |
1174 FSF_FEATURE_UPDATE_ALERT;
1175 req->erp_action = erp_action;
1176 req->handler = zfcp_fsf_exchange_config_data_handler;
1177 erp_action->fsf_req_id = req->req_id;
1178
1179 zfcp_fsf_start_erp_timer(req);
1180 retval = zfcp_fsf_req_send(req);
1181 if (retval) {
1182 zfcp_fsf_req_free(req);
1183 erp_action->fsf_req_id = 0;
1184 }
1185 out:
1186 spin_unlock_irq(&qdio->req_q_lock);
1187 return retval;
1188 }
1189
zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio * qdio,struct fsf_qtcb_bottom_config * data)1190 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1191 struct fsf_qtcb_bottom_config *data)
1192 {
1193 struct zfcp_fsf_req *req = NULL;
1194 int retval = -EIO;
1195
1196 spin_lock_irq(&qdio->req_q_lock);
1197 if (zfcp_qdio_sbal_get(qdio))
1198 goto out_unlock;
1199
1200 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1201 SBAL_FLAGS0_TYPE_READ, NULL);
1202
1203 if (IS_ERR(req)) {
1204 retval = PTR_ERR(req);
1205 goto out_unlock;
1206 }
1207
1208 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1209 req->handler = zfcp_fsf_exchange_config_data_handler;
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
1217 if (data)
1218 req->data = data;
1219
1220 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1221 retval = zfcp_fsf_req_send(req);
1222 spin_unlock_irq(&qdio->req_q_lock);
1223 if (!retval)
1224 wait_for_completion(&req->completion);
1225
1226 zfcp_fsf_req_free(req);
1227 return retval;
1228
1229 out_unlock:
1230 spin_unlock_irq(&qdio->req_q_lock);
1231 return retval;
1232 }
1233
1234 /**
1235 * zfcp_fsf_exchange_port_data - request information about local port
1236 * @erp_action: ERP action for the adapter for which port data is requested
1237 * Returns: 0 on success, error otherwise
1238 */
zfcp_fsf_exchange_port_data(struct zfcp_erp_action * erp_action)1239 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1240 {
1241 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1242 struct zfcp_fsf_req *req;
1243 int retval = -EIO;
1244
1245 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1246 return -EOPNOTSUPP;
1247
1248 spin_lock_irq(&qdio->req_q_lock);
1249 if (zfcp_qdio_sbal_get(qdio))
1250 goto out;
1251
1252 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1253 SBAL_FLAGS0_TYPE_READ,
1254 qdio->adapter->pool.erp_req);
1255
1256 if (IS_ERR(req)) {
1257 retval = PTR_ERR(req);
1258 goto out;
1259 }
1260
1261 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1262 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1263
1264 req->handler = zfcp_fsf_exchange_port_data_handler;
1265 req->erp_action = erp_action;
1266 erp_action->fsf_req_id = req->req_id;
1267
1268 zfcp_fsf_start_erp_timer(req);
1269 retval = zfcp_fsf_req_send(req);
1270 if (retval) {
1271 zfcp_fsf_req_free(req);
1272 erp_action->fsf_req_id = 0;
1273 }
1274 out:
1275 spin_unlock_irq(&qdio->req_q_lock);
1276 return retval;
1277 }
1278
1279 /**
1280 * zfcp_fsf_exchange_port_data_sync - request information about local port
1281 * @qdio: pointer to struct zfcp_qdio
1282 * @data: pointer to struct fsf_qtcb_bottom_port
1283 * Returns: 0 on success, error otherwise
1284 */
zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio * qdio,struct fsf_qtcb_bottom_port * data)1285 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1286 struct fsf_qtcb_bottom_port *data)
1287 {
1288 struct zfcp_fsf_req *req = NULL;
1289 int retval = -EIO;
1290
1291 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1292 return -EOPNOTSUPP;
1293
1294 spin_lock_irq(&qdio->req_q_lock);
1295 if (zfcp_qdio_sbal_get(qdio))
1296 goto out_unlock;
1297
1298 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1299 SBAL_FLAGS0_TYPE_READ, NULL);
1300
1301 if (IS_ERR(req)) {
1302 retval = PTR_ERR(req);
1303 goto out_unlock;
1304 }
1305
1306 if (data)
1307 req->data = data;
1308
1309 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1310
1311 req->handler = zfcp_fsf_exchange_port_data_handler;
1312 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1313 retval = zfcp_fsf_req_send(req);
1314 spin_unlock_irq(&qdio->req_q_lock);
1315
1316 if (!retval)
1317 wait_for_completion(&req->completion);
1318
1319 zfcp_fsf_req_free(req);
1320
1321 return retval;
1322
1323 out_unlock:
1324 spin_unlock_irq(&qdio->req_q_lock);
1325 return retval;
1326 }
1327
zfcp_fsf_open_port_handler(struct zfcp_fsf_req * req)1328 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1329 {
1330 struct zfcp_port *port = req->data;
1331 struct fsf_qtcb_header *header = &req->qtcb->header;
1332 struct fc_els_flogi *plogi;
1333
1334 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1335 goto out;
1336
1337 switch (header->fsf_status) {
1338 case FSF_PORT_ALREADY_OPEN:
1339 break;
1340 case FSF_ACCESS_DENIED:
1341 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1342 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1343 break;
1344 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1345 dev_warn(&req->adapter->ccw_device->dev,
1346 "Not enough FCP adapter resources to open "
1347 "remote port 0x%016Lx\n",
1348 (unsigned long long)port->wwpn);
1349 zfcp_erp_set_port_status(port,
1350 ZFCP_STATUS_COMMON_ERP_FAILED);
1351 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1352 break;
1353 case FSF_ADAPTER_STATUS_AVAILABLE:
1354 switch (header->fsf_status_qual.word[0]) {
1355 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1356 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1357 case FSF_SQ_NO_RETRY_POSSIBLE:
1358 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1359 break;
1360 }
1361 break;
1362 case FSF_GOOD:
1363 port->handle = header->port_handle;
1364 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1365 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1366 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1367 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1368 &port->status);
1369 /* check whether D_ID has changed during open */
1370 /*
1371 * FIXME: This check is not airtight, as the FCP channel does
1372 * not monitor closures of target port connections caused on
1373 * the remote side. Thus, they might miss out on invalidating
1374 * locally cached WWPNs (and other N_Port parameters) of gone
1375 * target ports. So, our heroic attempt to make things safe
1376 * could be undermined by 'open port' response data tagged with
1377 * obsolete WWPNs. Another reason to monitor potential
1378 * connection closures ourself at least (by interpreting
1379 * incoming ELS' and unsolicited status). It just crosses my
1380 * mind that one should be able to cross-check by means of
1381 * another GID_PN straight after a port has been opened.
1382 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1383 */
1384 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1385 if (req->qtcb->bottom.support.els1_length >=
1386 FSF_PLOGI_MIN_LEN)
1387 zfcp_fc_plogi_evaluate(port, plogi);
1388 break;
1389 case FSF_UNKNOWN_OP_SUBTYPE:
1390 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1391 break;
1392 }
1393
1394 out:
1395 put_device(&port->dev);
1396 }
1397
1398 /**
1399 * zfcp_fsf_open_port - create and send open port request
1400 * @erp_action: pointer to struct zfcp_erp_action
1401 * Returns: 0 on success, error otherwise
1402 */
zfcp_fsf_open_port(struct zfcp_erp_action * erp_action)1403 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1404 {
1405 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1406 struct zfcp_port *port = erp_action->port;
1407 struct zfcp_fsf_req *req;
1408 int retval = -EIO;
1409
1410 spin_lock_irq(&qdio->req_q_lock);
1411 if (zfcp_qdio_sbal_get(qdio))
1412 goto out;
1413
1414 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1415 SBAL_FLAGS0_TYPE_READ,
1416 qdio->adapter->pool.erp_req);
1417
1418 if (IS_ERR(req)) {
1419 retval = PTR_ERR(req);
1420 goto out;
1421 }
1422
1423 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1424 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1425
1426 req->handler = zfcp_fsf_open_port_handler;
1427 hton24(req->qtcb->bottom.support.d_id, port->d_id);
1428 req->data = port;
1429 req->erp_action = erp_action;
1430 erp_action->fsf_req_id = req->req_id;
1431 get_device(&port->dev);
1432
1433 zfcp_fsf_start_erp_timer(req);
1434 retval = zfcp_fsf_req_send(req);
1435 if (retval) {
1436 zfcp_fsf_req_free(req);
1437 erp_action->fsf_req_id = 0;
1438 put_device(&port->dev);
1439 }
1440 out:
1441 spin_unlock_irq(&qdio->req_q_lock);
1442 return retval;
1443 }
1444
zfcp_fsf_close_port_handler(struct zfcp_fsf_req * req)1445 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1446 {
1447 struct zfcp_port *port = req->data;
1448
1449 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1450 return;
1451
1452 switch (req->qtcb->header.fsf_status) {
1453 case FSF_PORT_HANDLE_NOT_VALID:
1454 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1455 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1456 break;
1457 case FSF_ADAPTER_STATUS_AVAILABLE:
1458 break;
1459 case FSF_GOOD:
1460 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1461 break;
1462 }
1463 }
1464
1465 /**
1466 * zfcp_fsf_close_port - create and send close port request
1467 * @erp_action: pointer to struct zfcp_erp_action
1468 * Returns: 0 on success, error otherwise
1469 */
zfcp_fsf_close_port(struct zfcp_erp_action * erp_action)1470 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1471 {
1472 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1473 struct zfcp_fsf_req *req;
1474 int retval = -EIO;
1475
1476 spin_lock_irq(&qdio->req_q_lock);
1477 if (zfcp_qdio_sbal_get(qdio))
1478 goto out;
1479
1480 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1481 SBAL_FLAGS0_TYPE_READ,
1482 qdio->adapter->pool.erp_req);
1483
1484 if (IS_ERR(req)) {
1485 retval = PTR_ERR(req);
1486 goto out;
1487 }
1488
1489 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1490 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1491
1492 req->handler = zfcp_fsf_close_port_handler;
1493 req->data = erp_action->port;
1494 req->erp_action = erp_action;
1495 req->qtcb->header.port_handle = erp_action->port->handle;
1496 erp_action->fsf_req_id = req->req_id;
1497
1498 zfcp_fsf_start_erp_timer(req);
1499 retval = zfcp_fsf_req_send(req);
1500 if (retval) {
1501 zfcp_fsf_req_free(req);
1502 erp_action->fsf_req_id = 0;
1503 }
1504 out:
1505 spin_unlock_irq(&qdio->req_q_lock);
1506 return retval;
1507 }
1508
zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req * req)1509 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1510 {
1511 struct zfcp_fc_wka_port *wka_port = req->data;
1512 struct fsf_qtcb_header *header = &req->qtcb->header;
1513
1514 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1515 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1516 goto out;
1517 }
1518
1519 switch (header->fsf_status) {
1520 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1521 dev_warn(&req->adapter->ccw_device->dev,
1522 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1523 /* fall through */
1524 case FSF_ADAPTER_STATUS_AVAILABLE:
1525 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1526 /* fall through */
1527 case FSF_ACCESS_DENIED:
1528 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1529 break;
1530 case FSF_GOOD:
1531 wka_port->handle = header->port_handle;
1532 /* fall through */
1533 case FSF_PORT_ALREADY_OPEN:
1534 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1535 }
1536 out:
1537 wake_up(&wka_port->completion_wq);
1538 }
1539
1540 /**
1541 * zfcp_fsf_open_wka_port - create and send open wka-port request
1542 * @wka_port: pointer to struct zfcp_fc_wka_port
1543 * Returns: 0 on success, error otherwise
1544 */
zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port * wka_port)1545 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1546 {
1547 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1548 struct zfcp_fsf_req *req;
1549 int retval = -EIO;
1550
1551 spin_lock_irq(&qdio->req_q_lock);
1552 if (zfcp_qdio_sbal_get(qdio))
1553 goto out;
1554
1555 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1556 SBAL_FLAGS0_TYPE_READ,
1557 qdio->adapter->pool.erp_req);
1558
1559 if (IS_ERR(req)) {
1560 retval = PTR_ERR(req);
1561 goto out;
1562 }
1563
1564 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1565 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1566
1567 req->handler = zfcp_fsf_open_wka_port_handler;
1568 hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1569 req->data = wka_port;
1570
1571 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1572 retval = zfcp_fsf_req_send(req);
1573 if (retval)
1574 zfcp_fsf_req_free(req);
1575 out:
1576 spin_unlock_irq(&qdio->req_q_lock);
1577 return retval;
1578 }
1579
zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req * req)1580 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1581 {
1582 struct zfcp_fc_wka_port *wka_port = req->data;
1583
1584 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1585 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1586 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1587 }
1588
1589 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1590 wake_up(&wka_port->completion_wq);
1591 }
1592
1593 /**
1594 * zfcp_fsf_close_wka_port - create and send close wka port request
1595 * @wka_port: WKA port to open
1596 * Returns: 0 on success, error otherwise
1597 */
zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port * wka_port)1598 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1599 {
1600 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1601 struct zfcp_fsf_req *req;
1602 int retval = -EIO;
1603
1604 spin_lock_irq(&qdio->req_q_lock);
1605 if (zfcp_qdio_sbal_get(qdio))
1606 goto out;
1607
1608 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1609 SBAL_FLAGS0_TYPE_READ,
1610 qdio->adapter->pool.erp_req);
1611
1612 if (IS_ERR(req)) {
1613 retval = PTR_ERR(req);
1614 goto out;
1615 }
1616
1617 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1618 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1619
1620 req->handler = zfcp_fsf_close_wka_port_handler;
1621 req->data = wka_port;
1622 req->qtcb->header.port_handle = wka_port->handle;
1623
1624 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1625 retval = zfcp_fsf_req_send(req);
1626 if (retval)
1627 zfcp_fsf_req_free(req);
1628 out:
1629 spin_unlock_irq(&qdio->req_q_lock);
1630 return retval;
1631 }
1632
zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req * req)1633 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1634 {
1635 struct zfcp_port *port = req->data;
1636 struct fsf_qtcb_header *header = &req->qtcb->header;
1637 struct scsi_device *sdev;
1638
1639 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1640 return;
1641
1642 switch (header->fsf_status) {
1643 case FSF_PORT_HANDLE_NOT_VALID:
1644 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
1645 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1646 break;
1647 case FSF_ACCESS_DENIED:
1648 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1649 break;
1650 case FSF_PORT_BOXED:
1651 /* can't use generic zfcp_erp_modify_port_status because
1652 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1653 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1654 shost_for_each_device(sdev, port->adapter->scsi_host)
1655 if (sdev_to_zfcp(sdev)->port == port)
1656 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1657 &sdev_to_zfcp(sdev)->status);
1658 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1659 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1660 "fscpph2");
1661 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1662 break;
1663 case FSF_ADAPTER_STATUS_AVAILABLE:
1664 switch (header->fsf_status_qual.word[0]) {
1665 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1666 /* fall through */
1667 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1668 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1669 break;
1670 }
1671 break;
1672 case FSF_GOOD:
1673 /* can't use generic zfcp_erp_modify_port_status because
1674 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1675 */
1676 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1677 shost_for_each_device(sdev, port->adapter->scsi_host)
1678 if (sdev_to_zfcp(sdev)->port == port)
1679 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1680 &sdev_to_zfcp(sdev)->status);
1681 break;
1682 }
1683 }
1684
1685 /**
1686 * zfcp_fsf_close_physical_port - close physical port
1687 * @erp_action: pointer to struct zfcp_erp_action
1688 * Returns: 0 on success
1689 */
zfcp_fsf_close_physical_port(struct zfcp_erp_action * erp_action)1690 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1691 {
1692 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1693 struct zfcp_fsf_req *req;
1694 int retval = -EIO;
1695
1696 spin_lock_irq(&qdio->req_q_lock);
1697 if (zfcp_qdio_sbal_get(qdio))
1698 goto out;
1699
1700 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1701 SBAL_FLAGS0_TYPE_READ,
1702 qdio->adapter->pool.erp_req);
1703
1704 if (IS_ERR(req)) {
1705 retval = PTR_ERR(req);
1706 goto out;
1707 }
1708
1709 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1710 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1711
1712 req->data = erp_action->port;
1713 req->qtcb->header.port_handle = erp_action->port->handle;
1714 req->erp_action = erp_action;
1715 req->handler = zfcp_fsf_close_physical_port_handler;
1716 erp_action->fsf_req_id = req->req_id;
1717
1718 zfcp_fsf_start_erp_timer(req);
1719 retval = zfcp_fsf_req_send(req);
1720 if (retval) {
1721 zfcp_fsf_req_free(req);
1722 erp_action->fsf_req_id = 0;
1723 }
1724 out:
1725 spin_unlock_irq(&qdio->req_q_lock);
1726 return retval;
1727 }
1728
zfcp_fsf_open_lun_handler(struct zfcp_fsf_req * req)1729 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1730 {
1731 struct zfcp_adapter *adapter = req->adapter;
1732 struct scsi_device *sdev = req->data;
1733 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
1734 struct fsf_qtcb_header *header = &req->qtcb->header;
1735 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1736
1737 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1738 return;
1739
1740 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1741 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1742 ZFCP_STATUS_LUN_SHARED |
1743 ZFCP_STATUS_LUN_READONLY,
1744 &zfcp_sdev->status);
1745
1746 switch (header->fsf_status) {
1747
1748 case FSF_PORT_HANDLE_NOT_VALID:
1749 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
1750 /* fall through */
1751 case FSF_LUN_ALREADY_OPEN:
1752 break;
1753 case FSF_ACCESS_DENIED:
1754 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
1755 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1756 break;
1757 case FSF_PORT_BOXED:
1758 zfcp_erp_set_port_status(zfcp_sdev->port,
1759 ZFCP_STATUS_COMMON_ACCESS_BOXED);
1760 zfcp_erp_port_reopen(zfcp_sdev->port,
1761 ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
1762 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1763 break;
1764 case FSF_LUN_SHARING_VIOLATION:
1765 zfcp_cfdc_lun_shrng_vltn(sdev, &header->fsf_status_qual);
1766 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1767 break;
1768 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1769 dev_warn(&adapter->ccw_device->dev,
1770 "No handle is available for LUN "
1771 "0x%016Lx on port 0x%016Lx\n",
1772 (unsigned long long)zfcp_scsi_dev_lun(sdev),
1773 (unsigned long long)zfcp_sdev->port->wwpn);
1774 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1775 /* fall through */
1776 case FSF_INVALID_COMMAND_OPTION:
1777 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1778 break;
1779 case FSF_ADAPTER_STATUS_AVAILABLE:
1780 switch (header->fsf_status_qual.word[0]) {
1781 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1782 zfcp_fc_test_link(zfcp_sdev->port);
1783 /* fall through */
1784 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1785 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1786 break;
1787 }
1788 break;
1789
1790 case FSF_GOOD:
1791 zfcp_sdev->lun_handle = header->lun_handle;
1792 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1793 zfcp_cfdc_open_lun_eval(sdev, bottom);
1794 break;
1795 }
1796 }
1797
1798 /**
1799 * zfcp_fsf_open_lun - open LUN
1800 * @erp_action: pointer to struct zfcp_erp_action
1801 * Returns: 0 on success, error otherwise
1802 */
zfcp_fsf_open_lun(struct zfcp_erp_action * erp_action)1803 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1804 {
1805 struct zfcp_adapter *adapter = erp_action->adapter;
1806 struct zfcp_qdio *qdio = adapter->qdio;
1807 struct zfcp_fsf_req *req;
1808 int retval = -EIO;
1809
1810 spin_lock_irq(&qdio->req_q_lock);
1811 if (zfcp_qdio_sbal_get(qdio))
1812 goto out;
1813
1814 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1815 SBAL_FLAGS0_TYPE_READ,
1816 adapter->pool.erp_req);
1817
1818 if (IS_ERR(req)) {
1819 retval = PTR_ERR(req);
1820 goto out;
1821 }
1822
1823 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1824 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1825
1826 req->qtcb->header.port_handle = erp_action->port->handle;
1827 req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1828 req->handler = zfcp_fsf_open_lun_handler;
1829 req->data = erp_action->sdev;
1830 req->erp_action = erp_action;
1831 erp_action->fsf_req_id = req->req_id;
1832
1833 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1834 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1835
1836 zfcp_fsf_start_erp_timer(req);
1837 retval = zfcp_fsf_req_send(req);
1838 if (retval) {
1839 zfcp_fsf_req_free(req);
1840 erp_action->fsf_req_id = 0;
1841 }
1842 out:
1843 spin_unlock_irq(&qdio->req_q_lock);
1844 return retval;
1845 }
1846
zfcp_fsf_close_lun_handler(struct zfcp_fsf_req * req)1847 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1848 {
1849 struct scsi_device *sdev = req->data;
1850 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
1851
1852 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1853 return;
1854
1855 switch (req->qtcb->header.fsf_status) {
1856 case FSF_PORT_HANDLE_NOT_VALID:
1857 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
1858 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1859 break;
1860 case FSF_LUN_HANDLE_NOT_VALID:
1861 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
1862 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1863 break;
1864 case FSF_PORT_BOXED:
1865 zfcp_erp_set_port_status(zfcp_sdev->port,
1866 ZFCP_STATUS_COMMON_ACCESS_BOXED);
1867 zfcp_erp_port_reopen(zfcp_sdev->port,
1868 ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
1869 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1870 break;
1871 case FSF_ADAPTER_STATUS_AVAILABLE:
1872 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1873 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1874 zfcp_fc_test_link(zfcp_sdev->port);
1875 /* fall through */
1876 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1877 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1878 break;
1879 }
1880 break;
1881 case FSF_GOOD:
1882 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1883 break;
1884 }
1885 }
1886
1887 /**
1888 * zfcp_fsf_close_LUN - close LUN
1889 * @erp_action: pointer to erp_action triggering the "close LUN"
1890 * Returns: 0 on success, error otherwise
1891 */
zfcp_fsf_close_lun(struct zfcp_erp_action * erp_action)1892 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
1893 {
1894 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1895 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1896 struct zfcp_fsf_req *req;
1897 int retval = -EIO;
1898
1899 spin_lock_irq(&qdio->req_q_lock);
1900 if (zfcp_qdio_sbal_get(qdio))
1901 goto out;
1902
1903 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1904 SBAL_FLAGS0_TYPE_READ,
1905 qdio->adapter->pool.erp_req);
1906
1907 if (IS_ERR(req)) {
1908 retval = PTR_ERR(req);
1909 goto out;
1910 }
1911
1912 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1913 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1914
1915 req->qtcb->header.port_handle = erp_action->port->handle;
1916 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1917 req->handler = zfcp_fsf_close_lun_handler;
1918 req->data = erp_action->sdev;
1919 req->erp_action = erp_action;
1920 erp_action->fsf_req_id = req->req_id;
1921
1922 zfcp_fsf_start_erp_timer(req);
1923 retval = zfcp_fsf_req_send(req);
1924 if (retval) {
1925 zfcp_fsf_req_free(req);
1926 erp_action->fsf_req_id = 0;
1927 }
1928 out:
1929 spin_unlock_irq(&qdio->req_q_lock);
1930 return retval;
1931 }
1932
zfcp_fsf_update_lat(struct fsf_latency_record * lat_rec,u32 lat)1933 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
1934 {
1935 lat_rec->sum += lat;
1936 lat_rec->min = min(lat_rec->min, lat);
1937 lat_rec->max = max(lat_rec->max, lat);
1938 }
1939
zfcp_fsf_req_trace(struct zfcp_fsf_req * req,struct scsi_cmnd * scsi)1940 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
1941 {
1942 struct fsf_qual_latency_info *lat_in;
1943 struct latency_cont *lat = NULL;
1944 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scsi->device);
1945 struct zfcp_blk_drv_data blktrc;
1946 int ticks = req->adapter->timer_ticks;
1947
1948 lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
1949
1950 blktrc.flags = 0;
1951 blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
1952 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1953 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
1954 blktrc.inb_usage = 0;
1955 blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
1956
1957 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
1958 !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
1959 blktrc.flags |= ZFCP_BLK_LAT_VALID;
1960 blktrc.channel_lat = lat_in->channel_lat * ticks;
1961 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
1962
1963 switch (req->qtcb->bottom.io.data_direction) {
1964 case FSF_DATADIR_DIF_READ_STRIP:
1965 case FSF_DATADIR_DIF_READ_CONVERT:
1966 case FSF_DATADIR_READ:
1967 lat = &zfcp_sdev->latencies.read;
1968 break;
1969 case FSF_DATADIR_DIF_WRITE_INSERT:
1970 case FSF_DATADIR_DIF_WRITE_CONVERT:
1971 case FSF_DATADIR_WRITE:
1972 lat = &zfcp_sdev->latencies.write;
1973 break;
1974 case FSF_DATADIR_CMND:
1975 lat = &zfcp_sdev->latencies.cmd;
1976 break;
1977 }
1978
1979 if (lat) {
1980 spin_lock(&zfcp_sdev->latencies.lock);
1981 zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
1982 zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
1983 lat->counter++;
1984 spin_unlock(&zfcp_sdev->latencies.lock);
1985 }
1986 }
1987
1988 blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
1989 sizeof(blktrc));
1990 }
1991
zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req * req)1992 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
1993 {
1994 struct scsi_cmnd *scmnd = req->data;
1995 struct scsi_device *sdev = scmnd->device;
1996 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
1997 struct fsf_qtcb_header *header = &req->qtcb->header;
1998
1999 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2000 return;
2001
2002 switch (header->fsf_status) {
2003 case FSF_HANDLE_MISMATCH:
2004 case FSF_PORT_HANDLE_NOT_VALID:
2005 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1");
2006 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2007 break;
2008 case FSF_FCPLUN_NOT_VALID:
2009 case FSF_LUN_HANDLE_NOT_VALID:
2010 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2011 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2012 break;
2013 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2014 zfcp_fsf_class_not_supp(req);
2015 break;
2016 case FSF_ACCESS_DENIED:
2017 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
2018 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2019 break;
2020 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2021 dev_err(&req->adapter->ccw_device->dev,
2022 "Incorrect direction %d, LUN 0x%016Lx on port "
2023 "0x%016Lx closed\n",
2024 req->qtcb->bottom.io.data_direction,
2025 (unsigned long long)zfcp_scsi_dev_lun(sdev),
2026 (unsigned long long)zfcp_sdev->port->wwpn);
2027 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2028 "fssfch3");
2029 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2030 break;
2031 case FSF_CMND_LENGTH_NOT_VALID:
2032 dev_err(&req->adapter->ccw_device->dev,
2033 "Incorrect CDB length %d, LUN 0x%016Lx on "
2034 "port 0x%016Lx closed\n",
2035 req->qtcb->bottom.io.fcp_cmnd_length,
2036 (unsigned long long)zfcp_scsi_dev_lun(sdev),
2037 (unsigned long long)zfcp_sdev->port->wwpn);
2038 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2039 "fssfch4");
2040 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2041 break;
2042 case FSF_PORT_BOXED:
2043 zfcp_erp_set_port_status(zfcp_sdev->port,
2044 ZFCP_STATUS_COMMON_ACCESS_BOXED);
2045 zfcp_erp_port_reopen(zfcp_sdev->port,
2046 ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2047 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2048 break;
2049 case FSF_LUN_BOXED:
2050 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2051 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2052 "fssfch6");
2053 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2054 break;
2055 case FSF_ADAPTER_STATUS_AVAILABLE:
2056 if (header->fsf_status_qual.word[0] ==
2057 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2058 zfcp_fc_test_link(zfcp_sdev->port);
2059 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2060 break;
2061 }
2062 }
2063
zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req * req)2064 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2065 {
2066 struct scsi_cmnd *scpnt;
2067 struct fcp_resp_with_ext *fcp_rsp;
2068 unsigned long flags;
2069
2070 read_lock_irqsave(&req->adapter->abort_lock, flags);
2071
2072 scpnt = req->data;
2073 if (unlikely(!scpnt)) {
2074 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2075 return;
2076 }
2077
2078 zfcp_fsf_fcp_handler_common(req);
2079
2080 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2081 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2082 goto skip_fsfstatus;
2083 }
2084
2085 switch (req->qtcb->header.fsf_status) {
2086 case FSF_INCONSISTENT_PROT_DATA:
2087 case FSF_INVALID_PROT_PARM:
2088 set_host_byte(scpnt, DID_ERROR);
2089 goto skip_fsfstatus;
2090 case FSF_BLOCK_GUARD_CHECK_FAILURE:
2091 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2092 goto skip_fsfstatus;
2093 case FSF_APP_TAG_CHECK_FAILURE:
2094 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2095 goto skip_fsfstatus;
2096 case FSF_REF_TAG_CHECK_FAILURE:
2097 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2098 goto skip_fsfstatus;
2099 }
2100 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2101 zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2102
2103 skip_fsfstatus:
2104 zfcp_fsf_req_trace(req, scpnt);
2105 zfcp_dbf_scsi_result(scpnt, req);
2106
2107 scpnt->host_scribble = NULL;
2108 (scpnt->scsi_done) (scpnt);
2109 /*
2110 * We must hold this lock until scsi_done has been called.
2111 * Otherwise we may call scsi_done after abort regarding this
2112 * command has completed.
2113 * Note: scsi_done must not block!
2114 */
2115 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2116 }
2117
zfcp_fsf_set_data_dir(struct scsi_cmnd * scsi_cmnd,u32 * data_dir)2118 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2119 {
2120 switch (scsi_get_prot_op(scsi_cmnd)) {
2121 case SCSI_PROT_NORMAL:
2122 switch (scsi_cmnd->sc_data_direction) {
2123 case DMA_NONE:
2124 *data_dir = FSF_DATADIR_CMND;
2125 break;
2126 case DMA_FROM_DEVICE:
2127 *data_dir = FSF_DATADIR_READ;
2128 break;
2129 case DMA_TO_DEVICE:
2130 *data_dir = FSF_DATADIR_WRITE;
2131 break;
2132 case DMA_BIDIRECTIONAL:
2133 return -EINVAL;
2134 }
2135 break;
2136
2137 case SCSI_PROT_READ_STRIP:
2138 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2139 break;
2140 case SCSI_PROT_WRITE_INSERT:
2141 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2142 break;
2143 case SCSI_PROT_READ_PASS:
2144 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2145 break;
2146 case SCSI_PROT_WRITE_PASS:
2147 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2148 break;
2149 default:
2150 return -EINVAL;
2151 }
2152
2153 return 0;
2154 }
2155
2156 /**
2157 * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2158 * @scsi_cmnd: scsi command to be sent
2159 */
zfcp_fsf_fcp_cmnd(struct scsi_cmnd * scsi_cmnd)2160 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2161 {
2162 struct zfcp_fsf_req *req;
2163 struct fcp_cmnd *fcp_cmnd;
2164 unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
2165 int real_bytes, retval = -EIO, dix_bytes = 0;
2166 struct scsi_device *sdev = scsi_cmnd->device;
2167 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2168 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2169 struct zfcp_qdio *qdio = adapter->qdio;
2170 struct fsf_qtcb_bottom_io *io;
2171 unsigned long flags;
2172
2173 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2174 ZFCP_STATUS_COMMON_UNBLOCKED)))
2175 return -EBUSY;
2176
2177 spin_lock_irqsave(&qdio->req_q_lock, flags);
2178 if (atomic_read(&qdio->req_q_free) <= 0) {
2179 atomic_inc(&qdio->req_q_full);
2180 goto out;
2181 }
2182
2183 if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2184 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2185
2186 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2187 sbtype, adapter->pool.scsi_req);
2188
2189 if (IS_ERR(req)) {
2190 retval = PTR_ERR(req);
2191 goto out;
2192 }
2193
2194 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2195
2196 io = &req->qtcb->bottom.io;
2197 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2198 req->data = scsi_cmnd;
2199 req->handler = zfcp_fsf_fcp_cmnd_handler;
2200 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2201 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2202 io->service_class = FSF_CLASS_3;
2203 io->fcp_cmnd_length = FCP_CMND_LEN;
2204
2205 if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2206 io->data_block_length = scsi_cmnd->device->sector_size;
2207 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2208 }
2209
2210 zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction);
2211
2212 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2213 zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd, 0);
2214
2215 if (scsi_prot_sg_count(scsi_cmnd)) {
2216 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2217 scsi_prot_sg_count(scsi_cmnd));
2218 dix_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2219 scsi_prot_sglist(scsi_cmnd));
2220 io->prot_data_length = dix_bytes;
2221 }
2222
2223 real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2224 scsi_sglist(scsi_cmnd));
2225
2226 if (unlikely(real_bytes < 0) || unlikely(dix_bytes < 0))
2227 goto failed_scsi_cmnd;
2228
2229 zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2230
2231 retval = zfcp_fsf_req_send(req);
2232 if (unlikely(retval))
2233 goto failed_scsi_cmnd;
2234
2235 goto out;
2236
2237 failed_scsi_cmnd:
2238 zfcp_fsf_req_free(req);
2239 scsi_cmnd->host_scribble = NULL;
2240 out:
2241 spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2242 return retval;
2243 }
2244
zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req * req)2245 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2246 {
2247 struct fcp_resp_with_ext *fcp_rsp;
2248 struct fcp_resp_rsp_info *rsp_info;
2249
2250 zfcp_fsf_fcp_handler_common(req);
2251
2252 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2253 rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2254
2255 if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2256 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2257 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2258 }
2259
2260 /**
2261 * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
2262 * @scmnd: SCSI command to send the task management command for
2263 * @tm_flags: unsigned byte for task management flags
2264 * Returns: on success pointer to struct fsf_req, NULL otherwise
2265 */
zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd * scmnd,u8 tm_flags)2266 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
2267 u8 tm_flags)
2268 {
2269 struct zfcp_fsf_req *req = NULL;
2270 struct fcp_cmnd *fcp_cmnd;
2271 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
2272 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2273
2274 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2275 ZFCP_STATUS_COMMON_UNBLOCKED)))
2276 return NULL;
2277
2278 spin_lock_irq(&qdio->req_q_lock);
2279 if (zfcp_qdio_sbal_get(qdio))
2280 goto out;
2281
2282 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2283 SBAL_FLAGS0_TYPE_WRITE,
2284 qdio->adapter->pool.scsi_req);
2285
2286 if (IS_ERR(req)) {
2287 req = NULL;
2288 goto out;
2289 }
2290
2291 req->data = scmnd;
2292 req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2293 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2294 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2295 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2296 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2297 req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2298
2299 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2300
2301 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2302 zfcp_fc_scsi_to_fcp(fcp_cmnd, scmnd, tm_flags);
2303
2304 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2305 if (!zfcp_fsf_req_send(req))
2306 goto out;
2307
2308 zfcp_fsf_req_free(req);
2309 req = NULL;
2310 out:
2311 spin_unlock_irq(&qdio->req_q_lock);
2312 return req;
2313 }
2314
zfcp_fsf_control_file_handler(struct zfcp_fsf_req * req)2315 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2316 {
2317 }
2318
2319 /**
2320 * zfcp_fsf_control_file - control file upload/download
2321 * @adapter: pointer to struct zfcp_adapter
2322 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2323 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2324 */
zfcp_fsf_control_file(struct zfcp_adapter * adapter,struct zfcp_fsf_cfdc * fsf_cfdc)2325 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2326 struct zfcp_fsf_cfdc *fsf_cfdc)
2327 {
2328 struct zfcp_qdio *qdio = adapter->qdio;
2329 struct zfcp_fsf_req *req = NULL;
2330 struct fsf_qtcb_bottom_support *bottom;
2331 int direction, retval = -EIO, bytes;
2332
2333 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2334 return ERR_PTR(-EOPNOTSUPP);
2335
2336 switch (fsf_cfdc->command) {
2337 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2338 direction = SBAL_FLAGS0_TYPE_WRITE;
2339 break;
2340 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2341 direction = SBAL_FLAGS0_TYPE_READ;
2342 break;
2343 default:
2344 return ERR_PTR(-EINVAL);
2345 }
2346
2347 spin_lock_irq(&qdio->req_q_lock);
2348 if (zfcp_qdio_sbal_get(qdio))
2349 goto out;
2350
2351 req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, direction, NULL);
2352 if (IS_ERR(req)) {
2353 retval = -EPERM;
2354 goto out;
2355 }
2356
2357 req->handler = zfcp_fsf_control_file_handler;
2358
2359 bottom = &req->qtcb->bottom.support;
2360 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2361 bottom->option = fsf_cfdc->option;
2362
2363 bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, fsf_cfdc->sg);
2364
2365 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2366 zfcp_fsf_req_free(req);
2367 goto out;
2368 }
2369 zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2370
2371 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2372 retval = zfcp_fsf_req_send(req);
2373 out:
2374 spin_unlock_irq(&qdio->req_q_lock);
2375
2376 if (!retval) {
2377 wait_for_completion(&req->completion);
2378 return req;
2379 }
2380 return ERR_PTR(retval);
2381 }
2382
2383 /**
2384 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2385 * @adapter: pointer to struct zfcp_adapter
2386 * @sbal_idx: response queue index of SBAL to be processed
2387 */
zfcp_fsf_reqid_check(struct zfcp_qdio * qdio,int sbal_idx)2388 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2389 {
2390 struct zfcp_adapter *adapter = qdio->adapter;
2391 struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2392 struct qdio_buffer_element *sbale;
2393 struct zfcp_fsf_req *fsf_req;
2394 unsigned long req_id;
2395 int idx;
2396
2397 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2398
2399 sbale = &sbal->element[idx];
2400 req_id = (unsigned long) sbale->addr;
2401 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2402
2403 if (!fsf_req) {
2404 /*
2405 * Unknown request means that we have potentially memory
2406 * corruption and must stop the machine immediately.
2407 */
2408 zfcp_qdio_siosl(adapter);
2409 panic("error: unknown req_id (%lx) on adapter %s.\n",
2410 req_id, dev_name(&adapter->ccw_device->dev));
2411 }
2412
2413 fsf_req->qdio_req.sbal_response = sbal_idx;
2414 zfcp_fsf_req_complete(fsf_req);
2415
2416 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2417 break;
2418 }
2419 }
2420
zfcp_fsf_get_req(struct zfcp_qdio * qdio,struct qdio_buffer * sbal)2421 struct zfcp_fsf_req *zfcp_fsf_get_req(struct zfcp_qdio *qdio,
2422 struct qdio_buffer *sbal)
2423 {
2424 struct qdio_buffer_element *sbale = &sbal->element[0];
2425 u64 req_id = (unsigned long) sbale->addr;
2426
2427 return zfcp_reqlist_find(qdio->adapter->req_list, req_id);
2428 }
2429