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[SCSI] zfcp: module parameter dbflevel for early debugging
[mirror_ubuntu-bionic-kernel.git] / drivers / s390 / scsi / zfcp_fsf.c
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CommitLineData
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
21struct kmem_cache *zfcp_fsf_qtcb_cache;
22
23static 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
31static 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
40static 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 */
50static 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
66static 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 */
78void 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
92static 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
109static 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 }
188out:
189 zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
190}
191
192static 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
210static 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
277static 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
299static 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
318static 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 */
395static 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 */
425void 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
448static 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
468static 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
525static 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 /* avoids adapter shutdown to be able to recognize
567 * events such as LINK UP */
568 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
569 &adapter->status);
570 zfcp_fsf_link_down_info_eval(req,
571 &qtcb->header.fsf_status_qual.link_down_info);
572 break;
573 default:
574 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
575 return;
576 }
577
578 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
579 adapter->hardware_version = bottom->hardware_version;
580 memcpy(fc_host_serial_number(shost), bottom->serial_number,
581 min(FC_SERIAL_NUMBER_SIZE, 17));
582 EBCASC(fc_host_serial_number(shost),
583 min(FC_SERIAL_NUMBER_SIZE, 17));
584 }
585
586 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
587 dev_err(&adapter->ccw_device->dev,
588 "The FCP adapter only supports newer "
589 "control block versions\n");
590 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4");
591 return;
592 }
593 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
594 dev_err(&adapter->ccw_device->dev,
595 "The FCP adapter only supports older "
596 "control block versions\n");
597 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5");
598 }
599}
600
601static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
602{
603 struct zfcp_adapter *adapter = req->adapter;
604 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
605 struct Scsi_Host *shost = adapter->scsi_host;
606
607 if (req->data)
608 memcpy(req->data, bottom, sizeof(*bottom));
609
610 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
611 fc_host_permanent_port_name(shost) = bottom->wwpn;
612 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
613 } else
614 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
615 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
616 fc_host_supported_speeds(shost) =
617 zfcp_fsf_convert_portspeed(bottom->supported_speed);
618 memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
619 FC_FC4_LIST_SIZE);
620 memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
621 FC_FC4_LIST_SIZE);
622}
623
624static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
625{
626 struct fsf_qtcb *qtcb = req->qtcb;
627
628 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
629 return;
630
631 switch (qtcb->header.fsf_status) {
632 case FSF_GOOD:
633 zfcp_fsf_exchange_port_evaluate(req);
634 break;
635 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
636 zfcp_fsf_exchange_port_evaluate(req);
637 zfcp_fsf_link_down_info_eval(req,
638 &qtcb->header.fsf_status_qual.link_down_info);
639 break;
640 }
641}
642
643static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
644{
645 struct zfcp_fsf_req *req;
646
647 if (likely(pool))
648 req = mempool_alloc(pool, GFP_ATOMIC);
649 else
650 req = kmalloc(sizeof(*req), GFP_ATOMIC);
651
652 if (unlikely(!req))
653 return NULL;
654
655 memset(req, 0, sizeof(*req));
656 req->pool = pool;
657 return req;
658}
659
660static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
661{
662 struct fsf_qtcb *qtcb;
663
664 if (likely(pool))
665 qtcb = mempool_alloc(pool, GFP_ATOMIC);
666 else
667 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
668
669 if (unlikely(!qtcb))
670 return NULL;
671
672 memset(qtcb, 0, sizeof(*qtcb));
673 return qtcb;
674}
675
676static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
677 u32 fsf_cmd, u8 sbtype,
678 mempool_t *pool)
679{
680 struct zfcp_adapter *adapter = qdio->adapter;
681 struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
682
683 if (unlikely(!req))
684 return ERR_PTR(-ENOMEM);
685
686 if (adapter->req_no == 0)
687 adapter->req_no++;
688
689 INIT_LIST_HEAD(&req->list);
690 init_timer(&req->timer);
691 init_completion(&req->completion);
692
693 req->adapter = adapter;
694 req->fsf_command = fsf_cmd;
695 req->req_id = adapter->req_no;
696
697 if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
698 if (likely(pool))
699 req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
700 else
701 req->qtcb = zfcp_qtcb_alloc(NULL);
702
703 if (unlikely(!req->qtcb)) {
704 zfcp_fsf_req_free(req);
705 return ERR_PTR(-ENOMEM);
706 }
707
708 req->seq_no = adapter->fsf_req_seq_no;
709 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
710 req->qtcb->prefix.req_id = req->req_id;
711 req->qtcb->prefix.ulp_info = 26;
712 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
713 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
714 req->qtcb->header.req_handle = req->req_id;
715 req->qtcb->header.fsf_command = req->fsf_command;
716 }
717
718 zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
719 req->qtcb, sizeof(struct fsf_qtcb));
720
721 return req;
722}
723
724static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
725{
726 struct zfcp_adapter *adapter = req->adapter;
727 struct zfcp_qdio *qdio = adapter->qdio;
728 int with_qtcb = (req->qtcb != NULL);
729 int req_id = req->req_id;
730
731 zfcp_reqlist_add(adapter->req_list, req);
732
733 req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
734 req->issued = get_tod_clock();
735 if (zfcp_qdio_send(qdio, &req->qdio_req)) {
736 del_timer(&req->timer);
737 /* lookup request again, list might have changed */
738 zfcp_reqlist_find_rm(adapter->req_list, req_id);
739 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
740 return -EIO;
741 }
742
743 /* Don't increase for unsolicited status */
744 if (with_qtcb)
745 adapter->fsf_req_seq_no++;
746 adapter->req_no++;
747
748 return 0;
749}
750
751/**
752 * zfcp_fsf_status_read - send status read request
753 * @adapter: pointer to struct zfcp_adapter
754 * @req_flags: request flags
755 * Returns: 0 on success, ERROR otherwise
756 */
757int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
758{
759 struct zfcp_adapter *adapter = qdio->adapter;
760 struct zfcp_fsf_req *req;
761 struct fsf_status_read_buffer *sr_buf;
762 struct page *page;
763 int retval = -EIO;
764
765 spin_lock_irq(&qdio->req_q_lock);
766 if (zfcp_qdio_sbal_get(qdio))
767 goto out;
768
769 req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS, 0,
770 adapter->pool.status_read_req);
771 if (IS_ERR(req)) {
772 retval = PTR_ERR(req);
773 goto out;
774 }
775
776 page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
777 if (!page) {
778 retval = -ENOMEM;
779 goto failed_buf;
780 }
781 sr_buf = page_address(page);
782 memset(sr_buf, 0, sizeof(*sr_buf));
783 req->data = sr_buf;
784
785 zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
786 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
787
788 retval = zfcp_fsf_req_send(req);
789 if (retval)
790 goto failed_req_send;
791
792 goto out;
793
794failed_req_send:
795 req->data = NULL;
796 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
797failed_buf:
798 zfcp_dbf_hba_fsf_uss("fssr__1", req);
799 zfcp_fsf_req_free(req);
800out:
801 spin_unlock_irq(&qdio->req_q_lock);
802 return retval;
803}
804
805static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
806{
807 struct scsi_device *sdev = req->data;
808 struct zfcp_scsi_dev *zfcp_sdev;
809 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
810
811 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
812 return;
813
814 zfcp_sdev = sdev_to_zfcp(sdev);
815
816 switch (req->qtcb->header.fsf_status) {
817 case FSF_PORT_HANDLE_NOT_VALID:
818 if (fsq->word[0] == fsq->word[1]) {
819 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
820 "fsafch1");
821 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
822 }
823 break;
824 case FSF_LUN_HANDLE_NOT_VALID:
825 if (fsq->word[0] == fsq->word[1]) {
826 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
827 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
828 }
829 break;
830 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
831 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
832 break;
833 case FSF_PORT_BOXED:
834 zfcp_erp_set_port_status(zfcp_sdev->port,
835 ZFCP_STATUS_COMMON_ACCESS_BOXED);
836 zfcp_erp_port_reopen(zfcp_sdev->port,
837 ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
838 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
839 break;
840 case FSF_LUN_BOXED:
841 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
842 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
843 "fsafch4");
844 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
845 break;
846 case FSF_ADAPTER_STATUS_AVAILABLE:
847 switch (fsq->word[0]) {
848 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
849 zfcp_fc_test_link(zfcp_sdev->port);
850 /* fall through */
851 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
852 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
853 break;
854 }
855 break;
856 case FSF_GOOD:
857 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
858 break;
859 }
860}
861
862/**
863 * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
864 * @scmnd: The SCSI command to abort
865 * Returns: pointer to struct zfcp_fsf_req
866 */
867
868struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
869{
870 struct zfcp_fsf_req *req = NULL;
871 struct scsi_device *sdev = scmnd->device;
872 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
873 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
874 unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
875
876 spin_lock_irq(&qdio->req_q_lock);
877 if (zfcp_qdio_sbal_get(qdio))
878 goto out;
879 req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
880 SBAL_SFLAGS0_TYPE_READ,
881 qdio->adapter->pool.scsi_abort);
882 if (IS_ERR(req)) {
883 req = NULL;
884 goto out;
885 }
886
887 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
888 ZFCP_STATUS_COMMON_UNBLOCKED)))
889 goto out_error_free;
890
891 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
892
893 req->data = sdev;
894 req->handler = zfcp_fsf_abort_fcp_command_handler;
895 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
896 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
897 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
898
899 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
900 if (!zfcp_fsf_req_send(req))
901 goto out;
902
903out_error_free:
904 zfcp_fsf_req_free(req);
905 req = NULL;
906out:
907 spin_unlock_irq(&qdio->req_q_lock);
908 return req;
909}
910
911static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
912{
913 struct zfcp_adapter *adapter = req->adapter;
914 struct zfcp_fsf_ct_els *ct = req->data;
915 struct fsf_qtcb_header *header = &req->qtcb->header;
916
917 ct->status = -EINVAL;
918
919 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
920 goto skip_fsfstatus;
921
922 switch (header->fsf_status) {
923 case FSF_GOOD:
924 zfcp_dbf_san_res("fsscth2", req);
925 ct->status = 0;
926 break;
927 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
928 zfcp_fsf_class_not_supp(req);
929 break;
930 case FSF_ADAPTER_STATUS_AVAILABLE:
931 switch (header->fsf_status_qual.word[0]){
932 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
933 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
934 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
935 break;
936 }
937 break;
938 case FSF_ACCESS_DENIED:
939 break;
940 case FSF_PORT_BOXED:
941 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
942 break;
943 case FSF_PORT_HANDLE_NOT_VALID:
944 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
945 /* fall through */
946 case FSF_GENERIC_COMMAND_REJECTED:
947 case FSF_PAYLOAD_SIZE_MISMATCH:
948 case FSF_REQUEST_SIZE_TOO_LARGE:
949 case FSF_RESPONSE_SIZE_TOO_LARGE:
950 case FSF_SBAL_MISMATCH:
951 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
952 break;
953 }
954
955skip_fsfstatus:
956 if (ct->handler)
957 ct->handler(ct->handler_data);
958}
959
960static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
961 struct zfcp_qdio_req *q_req,
962 struct scatterlist *sg_req,
963 struct scatterlist *sg_resp)
964{
965 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
966 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
967 zfcp_qdio_set_sbale_last(qdio, q_req);
968}
969
970static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
971 struct scatterlist *sg_req,
972 struct scatterlist *sg_resp)
973{
974 struct zfcp_adapter *adapter = req->adapter;
975 struct zfcp_qdio *qdio = adapter->qdio;
976 struct fsf_qtcb *qtcb = req->qtcb;
977 u32 feat = adapter->adapter_features;
978
979 if (zfcp_adapter_multi_buffer_active(adapter)) {
980 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
981 return -EIO;
982 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
983 return -EIO;
984
985 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
986 zfcp_qdio_sbale_count(sg_req));
987 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
988 zfcp_qdio_set_scount(qdio, &req->qdio_req);
989 return 0;
990 }
991
992 /* use single, unchained SBAL if it can hold the request */
993 if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
994 zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req,
995 sg_req, sg_resp);
996 return 0;
997 }
998
999 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS))
1000 return -EOPNOTSUPP;
1001
1002 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
1003 return -EIO;
1004
1005 qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req);
1006
1007 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1008 zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req);
1009
1010 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
1011 return -EIO;
1012
1013 qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp);
1014
1015 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1016
1017 return 0;
1018}
1019
1020static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1021 struct scatterlist *sg_req,
1022 struct scatterlist *sg_resp,
1023 unsigned int timeout)
1024{
1025 int ret;
1026
1027 ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
1028 if (ret)
1029 return ret;
1030
1031 /* common settings for ct/gs and els requests */
1032 if (timeout > 255)
1033 timeout = 255; /* max value accepted by hardware */
1034 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1035 req->qtcb->bottom.support.timeout = timeout;
1036 zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1037
1038 return 0;
1039}
1040
1041/**
1042 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1043 * @ct: pointer to struct zfcp_send_ct with data for request
1044 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1045 */
1046int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1047 struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1048 unsigned int timeout)
1049{
1050 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1051 struct zfcp_fsf_req *req;
1052 int ret = -EIO;
1053
1054 spin_lock_irq(&qdio->req_q_lock);
1055 if (zfcp_qdio_sbal_get(qdio))
1056 goto out;
1057
1058 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1059 SBAL_SFLAGS0_TYPE_WRITE_READ, pool);
1060
1061 if (IS_ERR(req)) {
1062 ret = PTR_ERR(req);
1063 goto out;
1064 }
1065
1066 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1067 ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1068 if (ret)
1069 goto failed_send;
1070
1071 req->handler = zfcp_fsf_send_ct_handler;
1072 req->qtcb->header.port_handle = wka_port->handle;
1073 req->data = ct;
1074
1075 zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1076
1077 ret = zfcp_fsf_req_send(req);
1078 if (ret)
1079 goto failed_send;
1080
1081 goto out;
1082
1083failed_send:
1084 zfcp_fsf_req_free(req);
1085out:
1086 spin_unlock_irq(&qdio->req_q_lock);
1087 return ret;
1088}
1089
1090static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1091{
1092 struct zfcp_fsf_ct_els *send_els = req->data;
1093 struct zfcp_port *port = send_els->port;
1094 struct fsf_qtcb_header *header = &req->qtcb->header;
1095
1096 send_els->status = -EINVAL;
1097
1098 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1099 goto skip_fsfstatus;
1100
1101 switch (header->fsf_status) {
1102 case FSF_GOOD:
1103 zfcp_dbf_san_res("fsselh1", req);
1104 send_els->status = 0;
1105 break;
1106 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1107 zfcp_fsf_class_not_supp(req);
1108 break;
1109 case FSF_ADAPTER_STATUS_AVAILABLE:
1110 switch (header->fsf_status_qual.word[0]){
1111 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1112 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1113 case FSF_SQ_RETRY_IF_POSSIBLE:
1114 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1115 break;
1116 }
1117 break;
1118 case FSF_ELS_COMMAND_REJECTED:
1119 case FSF_PAYLOAD_SIZE_MISMATCH:
1120 case FSF_REQUEST_SIZE_TOO_LARGE:
1121 case FSF_RESPONSE_SIZE_TOO_LARGE:
1122 break;
1123 case FSF_ACCESS_DENIED:
1124 if (port) {
1125 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1126 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1127 }
1128 break;
1129 case FSF_SBAL_MISMATCH:
1130 /* should never occur, avoided in zfcp_fsf_send_els */
1131 /* fall through */
1132 default:
1133 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1134 break;
1135 }
1136skip_fsfstatus:
1137 if (send_els->handler)
1138 send_els->handler(send_els->handler_data);
1139}
1140
1141/**
1142 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1143 * @els: pointer to struct zfcp_send_els with data for the command
1144 */
1145int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1146 struct zfcp_fsf_ct_els *els, unsigned int timeout)
1147{
1148 struct zfcp_fsf_req *req;
1149 struct zfcp_qdio *qdio = adapter->qdio;
1150 int ret = -EIO;
1151
1152 spin_lock_irq(&qdio->req_q_lock);
1153 if (zfcp_qdio_sbal_get(qdio))
1154 goto out;
1155
1156 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1157 SBAL_SFLAGS0_TYPE_WRITE_READ, NULL);
1158
1159 if (IS_ERR(req)) {
1160 ret = PTR_ERR(req);
1161 goto out;
1162 }
1163
1164 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1165
1166 if (!zfcp_adapter_multi_buffer_active(adapter))
1167 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1168
1169 ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1170
1171 if (ret)
1172 goto failed_send;
1173
1174 hton24(req->qtcb->bottom.support.d_id, d_id);
1175 req->handler = zfcp_fsf_send_els_handler;
1176 req->data = els;
1177
1178 zfcp_dbf_san_req("fssels1", req, d_id);
1179
1180 ret = zfcp_fsf_req_send(req);
1181 if (ret)
1182 goto failed_send;
1183
1184 goto out;
1185
1186failed_send:
1187 zfcp_fsf_req_free(req);
1188out:
1189 spin_unlock_irq(&qdio->req_q_lock);
1190 return ret;
1191}
1192
1193int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1194{
1195 struct zfcp_fsf_req *req;
1196 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1197 int retval = -EIO;
1198
1199 spin_lock_irq(&qdio->req_q_lock);
1200 if (zfcp_qdio_sbal_get(qdio))
1201 goto out;
1202
1203 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1204 SBAL_SFLAGS0_TYPE_READ,
1205 qdio->adapter->pool.erp_req);
1206
1207 if (IS_ERR(req)) {
1208 retval = PTR_ERR(req);
1209 goto out;
1210 }
1211
1212 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1213 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1214
1215 req->qtcb->bottom.config.feature_selection =
1216 FSF_FEATURE_CFDC |
1217 FSF_FEATURE_LUN_SHARING |
1218 FSF_FEATURE_NOTIFICATION_LOST |
1219 FSF_FEATURE_UPDATE_ALERT;
1220 req->erp_action = erp_action;
1221 req->handler = zfcp_fsf_exchange_config_data_handler;
1222 erp_action->fsf_req_id = req->req_id;
1223
1224 zfcp_fsf_start_erp_timer(req);
1225 retval = zfcp_fsf_req_send(req);
1226 if (retval) {
1227 zfcp_fsf_req_free(req);
1228 erp_action->fsf_req_id = 0;
1229 }
1230out:
1231 spin_unlock_irq(&qdio->req_q_lock);
1232 return retval;
1233}
1234
1235int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1236 struct fsf_qtcb_bottom_config *data)
1237{
1238 struct zfcp_fsf_req *req = NULL;
1239 int retval = -EIO;
1240
1241 spin_lock_irq(&qdio->req_q_lock);
1242 if (zfcp_qdio_sbal_get(qdio))
1243 goto out_unlock;
1244
1245 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1246 SBAL_SFLAGS0_TYPE_READ, NULL);
1247
1248 if (IS_ERR(req)) {
1249 retval = PTR_ERR(req);
1250 goto out_unlock;
1251 }
1252
1253 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1254 req->handler = zfcp_fsf_exchange_config_data_handler;
1255
1256 req->qtcb->bottom.config.feature_selection =
1257 FSF_FEATURE_CFDC |
1258 FSF_FEATURE_LUN_SHARING |
1259 FSF_FEATURE_NOTIFICATION_LOST |
1260 FSF_FEATURE_UPDATE_ALERT;
1261
1262 if (data)
1263 req->data = data;
1264
1265 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1266 retval = zfcp_fsf_req_send(req);
1267 spin_unlock_irq(&qdio->req_q_lock);
1268 if (!retval)
1269 wait_for_completion(&req->completion);
1270
1271 zfcp_fsf_req_free(req);
1272 return retval;
1273
1274out_unlock:
1275 spin_unlock_irq(&qdio->req_q_lock);
1276 return retval;
1277}
1278
1279/**
1280 * zfcp_fsf_exchange_port_data - request information about local port
1281 * @erp_action: ERP action for the adapter for which port data is requested
1282 * Returns: 0 on success, error otherwise
1283 */
1284int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1285{
1286 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1287 struct zfcp_fsf_req *req;
1288 int retval = -EIO;
1289
1290 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1291 return -EOPNOTSUPP;
1292
1293 spin_lock_irq(&qdio->req_q_lock);
1294 if (zfcp_qdio_sbal_get(qdio))
1295 goto out;
1296
1297 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1298 SBAL_SFLAGS0_TYPE_READ,
1299 qdio->adapter->pool.erp_req);
1300
1301 if (IS_ERR(req)) {
1302 retval = PTR_ERR(req);
1303 goto out;
1304 }
1305
1306 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1307 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1308
1309 req->handler = zfcp_fsf_exchange_port_data_handler;
1310 req->erp_action = erp_action;
1311 erp_action->fsf_req_id = req->req_id;
1312
1313 zfcp_fsf_start_erp_timer(req);
1314 retval = zfcp_fsf_req_send(req);
1315 if (retval) {
1316 zfcp_fsf_req_free(req);
1317 erp_action->fsf_req_id = 0;
1318 }
1319out:
1320 spin_unlock_irq(&qdio->req_q_lock);
1321 return retval;
1322}
1323
1324/**
1325 * zfcp_fsf_exchange_port_data_sync - request information about local port
1326 * @qdio: pointer to struct zfcp_qdio
1327 * @data: pointer to struct fsf_qtcb_bottom_port
1328 * Returns: 0 on success, error otherwise
1329 */
1330int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1331 struct fsf_qtcb_bottom_port *data)
1332{
1333 struct zfcp_fsf_req *req = NULL;
1334 int retval = -EIO;
1335
1336 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1337 return -EOPNOTSUPP;
1338
1339 spin_lock_irq(&qdio->req_q_lock);
1340 if (zfcp_qdio_sbal_get(qdio))
1341 goto out_unlock;
1342
1343 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1344 SBAL_SFLAGS0_TYPE_READ, NULL);
1345
1346 if (IS_ERR(req)) {
1347 retval = PTR_ERR(req);
1348 goto out_unlock;
1349 }
1350
1351 if (data)
1352 req->data = data;
1353
1354 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1355
1356 req->handler = zfcp_fsf_exchange_port_data_handler;
1357 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1358 retval = zfcp_fsf_req_send(req);
1359 spin_unlock_irq(&qdio->req_q_lock);
1360
1361 if (!retval)
1362 wait_for_completion(&req->completion);
1363
1364 zfcp_fsf_req_free(req);
1365
1366 return retval;
1367
1368out_unlock:
1369 spin_unlock_irq(&qdio->req_q_lock);
1370 return retval;
1371}
1372
1373static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1374{
1375 struct zfcp_port *port = req->data;
1376 struct fsf_qtcb_header *header = &req->qtcb->header;
1377 struct fc_els_flogi *plogi;
1378
1379 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1380 goto out;
1381
1382 switch (header->fsf_status) {
1383 case FSF_PORT_ALREADY_OPEN:
1384 break;
1385 case FSF_ACCESS_DENIED:
1386 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1387 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1388 break;
1389 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1390 dev_warn(&req->adapter->ccw_device->dev,
1391 "Not enough FCP adapter resources to open "
1392 "remote port 0x%016Lx\n",
1393 (unsigned long long)port->wwpn);
1394 zfcp_erp_set_port_status(port,
1395 ZFCP_STATUS_COMMON_ERP_FAILED);
1396 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1397 break;
1398 case FSF_ADAPTER_STATUS_AVAILABLE:
1399 switch (header->fsf_status_qual.word[0]) {
1400 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1401 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1402 case FSF_SQ_NO_RETRY_POSSIBLE:
1403 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1404 break;
1405 }
1406 break;
1407 case FSF_GOOD:
1408 port->handle = header->port_handle;
1409 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1410 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1411 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1412 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1413 &port->status);
1414 /* check whether D_ID has changed during open */
1415 /*
1416 * FIXME: This check is not airtight, as the FCP channel does
1417 * not monitor closures of target port connections caused on
1418 * the remote side. Thus, they might miss out on invalidating
1419 * locally cached WWPNs (and other N_Port parameters) of gone
1420 * target ports. So, our heroic attempt to make things safe
1421 * could be undermined by 'open port' response data tagged with
1422 * obsolete WWPNs. Another reason to monitor potential
1423 * connection closures ourself at least (by interpreting
1424 * incoming ELS' and unsolicited status). It just crosses my
1425 * mind that one should be able to cross-check by means of
1426 * another GID_PN straight after a port has been opened.
1427 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1428 */
1429 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1430 if (req->qtcb->bottom.support.els1_length >=
1431 FSF_PLOGI_MIN_LEN)
1432 zfcp_fc_plogi_evaluate(port, plogi);
1433 break;
1434 case FSF_UNKNOWN_OP_SUBTYPE:
1435 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1436 break;
1437 }
1438
1439out:
1440 put_device(&port->dev);
1441}
1442
1443/**
1444 * zfcp_fsf_open_port - create and send open port request
1445 * @erp_action: pointer to struct zfcp_erp_action
1446 * Returns: 0 on success, error otherwise
1447 */
1448int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1449{
1450 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1451 struct zfcp_port *port = erp_action->port;
1452 struct zfcp_fsf_req *req;
1453 int retval = -EIO;
1454
1455 spin_lock_irq(&qdio->req_q_lock);
1456 if (zfcp_qdio_sbal_get(qdio))
1457 goto out;
1458
1459 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1460 SBAL_SFLAGS0_TYPE_READ,
1461 qdio->adapter->pool.erp_req);
1462
1463 if (IS_ERR(req)) {
1464 retval = PTR_ERR(req);
1465 goto out;
1466 }
1467
1468 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1469 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1470
1471 req->handler = zfcp_fsf_open_port_handler;
1472 hton24(req->qtcb->bottom.support.d_id, port->d_id);
1473 req->data = port;
1474 req->erp_action = erp_action;
1475 erp_action->fsf_req_id = req->req_id;
1476 get_device(&port->dev);
1477
1478 zfcp_fsf_start_erp_timer(req);
1479 retval = zfcp_fsf_req_send(req);
1480 if (retval) {
1481 zfcp_fsf_req_free(req);
1482 erp_action->fsf_req_id = 0;
1483 put_device(&port->dev);
1484 }
1485out:
1486 spin_unlock_irq(&qdio->req_q_lock);
1487 return retval;
1488}
1489
1490static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1491{
1492 struct zfcp_port *port = req->data;
1493
1494 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1495 return;
1496
1497 switch (req->qtcb->header.fsf_status) {
1498 case FSF_PORT_HANDLE_NOT_VALID:
1499 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1500 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1501 break;
1502 case FSF_ADAPTER_STATUS_AVAILABLE:
1503 break;
1504 case FSF_GOOD:
1505 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1506 break;
1507 }
1508}
1509
1510/**
1511 * zfcp_fsf_close_port - create and send close port request
1512 * @erp_action: pointer to struct zfcp_erp_action
1513 * Returns: 0 on success, error otherwise
1514 */
1515int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1516{
1517 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1518 struct zfcp_fsf_req *req;
1519 int retval = -EIO;
1520
1521 spin_lock_irq(&qdio->req_q_lock);
1522 if (zfcp_qdio_sbal_get(qdio))
1523 goto out;
1524
1525 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1526 SBAL_SFLAGS0_TYPE_READ,
1527 qdio->adapter->pool.erp_req);
1528
1529 if (IS_ERR(req)) {
1530 retval = PTR_ERR(req);
1531 goto out;
1532 }
1533
1534 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1535 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1536
1537 req->handler = zfcp_fsf_close_port_handler;
1538 req->data = erp_action->port;
1539 req->erp_action = erp_action;
1540 req->qtcb->header.port_handle = erp_action->port->handle;
1541 erp_action->fsf_req_id = req->req_id;
1542
1543 zfcp_fsf_start_erp_timer(req);
1544 retval = zfcp_fsf_req_send(req);
1545 if (retval) {
1546 zfcp_fsf_req_free(req);
1547 erp_action->fsf_req_id = 0;
1548 }
1549out:
1550 spin_unlock_irq(&qdio->req_q_lock);
1551 return retval;
1552}
1553
1554static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1555{
1556 struct zfcp_fc_wka_port *wka_port = req->data;
1557 struct fsf_qtcb_header *header = &req->qtcb->header;
1558
1559 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1560 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1561 goto out;
1562 }
1563
1564 switch (header->fsf_status) {
1565 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1566 dev_warn(&req->adapter->ccw_device->dev,
1567 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1568 /* fall through */
1569 case FSF_ADAPTER_STATUS_AVAILABLE:
1570 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1571 /* fall through */
1572 case FSF_ACCESS_DENIED:
1573 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1574 break;
1575 case FSF_GOOD:
1576 wka_port->handle = header->port_handle;
1577 /* fall through */
1578 case FSF_PORT_ALREADY_OPEN:
1579 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1580 }
1581out:
1582 wake_up(&wka_port->completion_wq);
1583}
1584
1585/**
1586 * zfcp_fsf_open_wka_port - create and send open wka-port request
1587 * @wka_port: pointer to struct zfcp_fc_wka_port
1588 * Returns: 0 on success, error otherwise
1589 */
1590int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1591{
1592 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1593 struct zfcp_fsf_req *req;
1594 int retval = -EIO;
1595
1596 spin_lock_irq(&qdio->req_q_lock);
1597 if (zfcp_qdio_sbal_get(qdio))
1598 goto out;
1599
1600 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1601 SBAL_SFLAGS0_TYPE_READ,
1602 qdio->adapter->pool.erp_req);
1603
1604 if (IS_ERR(req)) {
1605 retval = PTR_ERR(req);
1606 goto out;
1607 }
1608
1609 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1610 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1611
1612 req->handler = zfcp_fsf_open_wka_port_handler;
1613 hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1614 req->data = wka_port;
1615
1616 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1617 retval = zfcp_fsf_req_send(req);
1618 if (retval)
1619 zfcp_fsf_req_free(req);
1620out:
1621 spin_unlock_irq(&qdio->req_q_lock);
1622 return retval;
1623}
1624
1625static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1626{
1627 struct zfcp_fc_wka_port *wka_port = req->data;
1628
1629 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1630 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1631 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1632 }
1633
1634 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1635 wake_up(&wka_port->completion_wq);
1636}
1637
1638/**
1639 * zfcp_fsf_close_wka_port - create and send close wka port request
1640 * @wka_port: WKA port to open
1641 * Returns: 0 on success, error otherwise
1642 */
1643int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1644{
1645 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1646 struct zfcp_fsf_req *req;
1647 int retval = -EIO;
1648
1649 spin_lock_irq(&qdio->req_q_lock);
1650 if (zfcp_qdio_sbal_get(qdio))
1651 goto out;
1652
1653 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1654 SBAL_SFLAGS0_TYPE_READ,
1655 qdio->adapter->pool.erp_req);
1656
1657 if (IS_ERR(req)) {
1658 retval = PTR_ERR(req);
1659 goto out;
1660 }
1661
1662 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1663 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1664
1665 req->handler = zfcp_fsf_close_wka_port_handler;
1666 req->data = wka_port;
1667 req->qtcb->header.port_handle = wka_port->handle;
1668
1669 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1670 retval = zfcp_fsf_req_send(req);
1671 if (retval)
1672 zfcp_fsf_req_free(req);
1673out:
1674 spin_unlock_irq(&qdio->req_q_lock);
1675 return retval;
1676}
1677
1678static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1679{
1680 struct zfcp_port *port = req->data;
1681 struct fsf_qtcb_header *header = &req->qtcb->header;
1682 struct scsi_device *sdev;
1683
1684 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1685 return;
1686
1687 switch (header->fsf_status) {
1688 case FSF_PORT_HANDLE_NOT_VALID:
1689 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
1690 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1691 break;
1692 case FSF_ACCESS_DENIED:
1693 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1694 break;
1695 case FSF_PORT_BOXED:
1696 /* can't use generic zfcp_erp_modify_port_status because
1697 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1698 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1699 shost_for_each_device(sdev, port->adapter->scsi_host)
1700 if (sdev_to_zfcp(sdev)->port == port)
1701 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1702 &sdev_to_zfcp(sdev)->status);
1703 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1704 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1705 "fscpph2");
1706 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1707 break;
1708 case FSF_ADAPTER_STATUS_AVAILABLE:
1709 switch (header->fsf_status_qual.word[0]) {
1710 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1711 /* fall through */
1712 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1713 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1714 break;
1715 }
1716 break;
1717 case FSF_GOOD:
1718 /* can't use generic zfcp_erp_modify_port_status because
1719 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1720 */
1721 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1722 shost_for_each_device(sdev, port->adapter->scsi_host)
1723 if (sdev_to_zfcp(sdev)->port == port)
1724 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1725 &sdev_to_zfcp(sdev)->status);
1726 break;
1727 }
1728}
1729
1730/**
1731 * zfcp_fsf_close_physical_port - close physical port
1732 * @erp_action: pointer to struct zfcp_erp_action
1733 * Returns: 0 on success
1734 */
1735int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1736{
1737 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1738 struct zfcp_fsf_req *req;
1739 int retval = -EIO;
1740
1741 spin_lock_irq(&qdio->req_q_lock);
1742 if (zfcp_qdio_sbal_get(qdio))
1743 goto out;
1744
1745 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1746 SBAL_SFLAGS0_TYPE_READ,
1747 qdio->adapter->pool.erp_req);
1748
1749 if (IS_ERR(req)) {
1750 retval = PTR_ERR(req);
1751 goto out;
1752 }
1753
1754 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1755 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1756
1757 req->data = erp_action->port;
1758 req->qtcb->header.port_handle = erp_action->port->handle;
1759 req->erp_action = erp_action;
1760 req->handler = zfcp_fsf_close_physical_port_handler;
1761 erp_action->fsf_req_id = req->req_id;
1762
1763 zfcp_fsf_start_erp_timer(req);
1764 retval = zfcp_fsf_req_send(req);
1765 if (retval) {
1766 zfcp_fsf_req_free(req);
1767 erp_action->fsf_req_id = 0;
1768 }
1769out:
1770 spin_unlock_irq(&qdio->req_q_lock);
1771 return retval;
1772}
1773
1774static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1775{
1776 struct zfcp_adapter *adapter = req->adapter;
1777 struct scsi_device *sdev = req->data;
1778 struct zfcp_scsi_dev *zfcp_sdev;
1779 struct fsf_qtcb_header *header = &req->qtcb->header;
1780 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1781
1782 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1783 return;
1784
1785 zfcp_sdev = sdev_to_zfcp(sdev);
1786
1787 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1788 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1789 ZFCP_STATUS_LUN_SHARED |
1790 ZFCP_STATUS_LUN_READONLY,
1791 &zfcp_sdev->status);
1792
1793 switch (header->fsf_status) {
1794
1795 case FSF_PORT_HANDLE_NOT_VALID:
1796 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
1797 /* fall through */
1798 case FSF_LUN_ALREADY_OPEN:
1799 break;
1800 case FSF_ACCESS_DENIED:
1801 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
1802 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1803 break;
1804 case FSF_PORT_BOXED:
1805 zfcp_erp_set_port_status(zfcp_sdev->port,
1806 ZFCP_STATUS_COMMON_ACCESS_BOXED);
1807 zfcp_erp_port_reopen(zfcp_sdev->port,
1808 ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
1809 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1810 break;
1811 case FSF_LUN_SHARING_VIOLATION:
1812 zfcp_cfdc_lun_shrng_vltn(sdev, &header->fsf_status_qual);
1813 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1814 break;
1815 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1816 dev_warn(&adapter->ccw_device->dev,
1817 "No handle is available for LUN "
1818 "0x%016Lx on port 0x%016Lx\n",
1819 (unsigned long long)zfcp_scsi_dev_lun(sdev),
1820 (unsigned long long)zfcp_sdev->port->wwpn);
1821 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1822 /* fall through */
1823 case FSF_INVALID_COMMAND_OPTION:
1824 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1825 break;
1826 case FSF_ADAPTER_STATUS_AVAILABLE:
1827 switch (header->fsf_status_qual.word[0]) {
1828 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1829 zfcp_fc_test_link(zfcp_sdev->port);
1830 /* fall through */
1831 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1832 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1833 break;
1834 }
1835 break;
1836
1837 case FSF_GOOD:
1838 zfcp_sdev->lun_handle = header->lun_handle;
1839 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1840 zfcp_cfdc_open_lun_eval(sdev, bottom);
1841 break;
1842 }
1843}
1844
1845/**
1846 * zfcp_fsf_open_lun - open LUN
1847 * @erp_action: pointer to struct zfcp_erp_action
1848 * Returns: 0 on success, error otherwise
1849 */
1850int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1851{
1852 struct zfcp_adapter *adapter = erp_action->adapter;
1853 struct zfcp_qdio *qdio = adapter->qdio;
1854 struct zfcp_fsf_req *req;
1855 int retval = -EIO;
1856
1857 spin_lock_irq(&qdio->req_q_lock);
1858 if (zfcp_qdio_sbal_get(qdio))
1859 goto out;
1860
1861 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1862 SBAL_SFLAGS0_TYPE_READ,
1863 adapter->pool.erp_req);
1864
1865 if (IS_ERR(req)) {
1866 retval = PTR_ERR(req);
1867 goto out;
1868 }
1869
1870 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1871 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1872
1873 req->qtcb->header.port_handle = erp_action->port->handle;
1874 req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1875 req->handler = zfcp_fsf_open_lun_handler;
1876 req->data = erp_action->sdev;
1877 req->erp_action = erp_action;
1878 erp_action->fsf_req_id = req->req_id;
1879
1880 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1881 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1882
1883 zfcp_fsf_start_erp_timer(req);
1884 retval = zfcp_fsf_req_send(req);
1885 if (retval) {
1886 zfcp_fsf_req_free(req);
1887 erp_action->fsf_req_id = 0;
1888 }
1889out:
1890 spin_unlock_irq(&qdio->req_q_lock);
1891 return retval;
1892}
1893
1894static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1895{
1896 struct scsi_device *sdev = req->data;
1897 struct zfcp_scsi_dev *zfcp_sdev;
1898
1899 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1900 return;
1901
1902 zfcp_sdev = sdev_to_zfcp(sdev);
1903
1904 switch (req->qtcb->header.fsf_status) {
1905 case FSF_PORT_HANDLE_NOT_VALID:
1906 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
1907 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1908 break;
1909 case FSF_LUN_HANDLE_NOT_VALID:
1910 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
1911 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1912 break;
1913 case FSF_PORT_BOXED:
1914 zfcp_erp_set_port_status(zfcp_sdev->port,
1915 ZFCP_STATUS_COMMON_ACCESS_BOXED);
1916 zfcp_erp_port_reopen(zfcp_sdev->port,
1917 ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
1918 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1919 break;
1920 case FSF_ADAPTER_STATUS_AVAILABLE:
1921 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1922 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1923 zfcp_fc_test_link(zfcp_sdev->port);
1924 /* fall through */
1925 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1926 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1927 break;
1928 }
1929 break;
1930 case FSF_GOOD:
1931 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1932 break;
1933 }
1934}
1935
1936/**
1937 * zfcp_fsf_close_LUN - close LUN
1938 * @erp_action: pointer to erp_action triggering the "close LUN"
1939 * Returns: 0 on success, error otherwise
1940 */
1941int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
1942{
1943 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1944 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1945 struct zfcp_fsf_req *req;
1946 int retval = -EIO;
1947
1948 spin_lock_irq(&qdio->req_q_lock);
1949 if (zfcp_qdio_sbal_get(qdio))
1950 goto out;
1951
1952 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1953 SBAL_SFLAGS0_TYPE_READ,
1954 qdio->adapter->pool.erp_req);
1955
1956 if (IS_ERR(req)) {
1957 retval = PTR_ERR(req);
1958 goto out;
1959 }
1960
1961 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1962 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1963
1964 req->qtcb->header.port_handle = erp_action->port->handle;
1965 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1966 req->handler = zfcp_fsf_close_lun_handler;
1967 req->data = erp_action->sdev;
1968 req->erp_action = erp_action;
1969 erp_action->fsf_req_id = req->req_id;
1970
1971 zfcp_fsf_start_erp_timer(req);
1972 retval = zfcp_fsf_req_send(req);
1973 if (retval) {
1974 zfcp_fsf_req_free(req);
1975 erp_action->fsf_req_id = 0;
1976 }
1977out:
1978 spin_unlock_irq(&qdio->req_q_lock);
1979 return retval;
1980}
1981
1982static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
1983{
1984 lat_rec->sum += lat;
1985 lat_rec->min = min(lat_rec->min, lat);
1986 lat_rec->max = max(lat_rec->max, lat);
1987}
1988
1989static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
1990{
1991 struct fsf_qual_latency_info *lat_in;
1992 struct latency_cont *lat = NULL;
1993 struct zfcp_scsi_dev *zfcp_sdev;
1994 struct zfcp_blk_drv_data blktrc;
1995 int ticks = req->adapter->timer_ticks;
1996
1997 lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
1998
1999 blktrc.flags = 0;
2000 blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2001 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2002 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2003 blktrc.inb_usage = 0;
2004 blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
2005
2006 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
2007 !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2008 zfcp_sdev = sdev_to_zfcp(scsi->device);
2009 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2010 blktrc.channel_lat = lat_in->channel_lat * ticks;
2011 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2012
2013 switch (req->qtcb->bottom.io.data_direction) {
2014 case FSF_DATADIR_DIF_READ_STRIP:
2015 case FSF_DATADIR_DIF_READ_CONVERT:
2016 case FSF_DATADIR_READ:
2017 lat = &zfcp_sdev->latencies.read;
2018 break;
2019 case FSF_DATADIR_DIF_WRITE_INSERT:
2020 case FSF_DATADIR_DIF_WRITE_CONVERT:
2021 case FSF_DATADIR_WRITE:
2022 lat = &zfcp_sdev->latencies.write;
2023 break;
2024 case FSF_DATADIR_CMND:
2025 lat = &zfcp_sdev->latencies.cmd;
2026 break;
2027 }
2028
2029 if (lat) {
2030 spin_lock(&zfcp_sdev->latencies.lock);
2031 zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2032 zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2033 lat->counter++;
2034 spin_unlock(&zfcp_sdev->latencies.lock);
2035 }
2036 }
2037
2038 blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2039 sizeof(blktrc));
2040}
2041
2042static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
2043{
2044 struct scsi_cmnd *scmnd = req->data;
2045 struct scsi_device *sdev = scmnd->device;
2046 struct zfcp_scsi_dev *zfcp_sdev;
2047 struct fsf_qtcb_header *header = &req->qtcb->header;
2048
2049 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2050 return;
2051
2052 zfcp_sdev = sdev_to_zfcp(sdev);
2053
2054 switch (header->fsf_status) {
2055 case FSF_HANDLE_MISMATCH:
2056 case FSF_PORT_HANDLE_NOT_VALID:
2057 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1");
2058 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2059 break;
2060 case FSF_FCPLUN_NOT_VALID:
2061 case FSF_LUN_HANDLE_NOT_VALID:
2062 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2063 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2064 break;
2065 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2066 zfcp_fsf_class_not_supp(req);
2067 break;
2068 case FSF_ACCESS_DENIED:
2069 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
2070 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2071 break;
2072 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2073 dev_err(&req->adapter->ccw_device->dev,
2074 "Incorrect direction %d, LUN 0x%016Lx on port "
2075 "0x%016Lx closed\n",
2076 req->qtcb->bottom.io.data_direction,
2077 (unsigned long long)zfcp_scsi_dev_lun(sdev),
2078 (unsigned long long)zfcp_sdev->port->wwpn);
2079 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2080 "fssfch3");
2081 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2082 break;
2083 case FSF_CMND_LENGTH_NOT_VALID:
2084 dev_err(&req->adapter->ccw_device->dev,
2085 "Incorrect CDB length %d, LUN 0x%016Lx on "
2086 "port 0x%016Lx closed\n",
2087 req->qtcb->bottom.io.fcp_cmnd_length,
2088 (unsigned long long)zfcp_scsi_dev_lun(sdev),
2089 (unsigned long long)zfcp_sdev->port->wwpn);
2090 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2091 "fssfch4");
2092 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2093 break;
2094 case FSF_PORT_BOXED:
2095 zfcp_erp_set_port_status(zfcp_sdev->port,
2096 ZFCP_STATUS_COMMON_ACCESS_BOXED);
2097 zfcp_erp_port_reopen(zfcp_sdev->port,
2098 ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2099 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2100 break;
2101 case FSF_LUN_BOXED:
2102 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2103 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2104 "fssfch6");
2105 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2106 break;
2107 case FSF_ADAPTER_STATUS_AVAILABLE:
2108 if (header->fsf_status_qual.word[0] ==
2109 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2110 zfcp_fc_test_link(zfcp_sdev->port);
2111 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2112 break;
2113 }
2114}
2115
2116static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2117{
2118 struct scsi_cmnd *scpnt;
2119 struct fcp_resp_with_ext *fcp_rsp;
2120 unsigned long flags;
2121
2122 read_lock_irqsave(&req->adapter->abort_lock, flags);
2123
2124 scpnt = req->data;
2125 if (unlikely(!scpnt)) {
2126 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2127 return;
2128 }
2129
2130 zfcp_fsf_fcp_handler_common(req);
2131
2132 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2133 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2134 goto skip_fsfstatus;
2135 }
2136
2137 switch (req->qtcb->header.fsf_status) {
2138 case FSF_INCONSISTENT_PROT_DATA:
2139 case FSF_INVALID_PROT_PARM:
2140 set_host_byte(scpnt, DID_ERROR);
2141 goto skip_fsfstatus;
2142 case FSF_BLOCK_GUARD_CHECK_FAILURE:
2143 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2144 goto skip_fsfstatus;
2145 case FSF_APP_TAG_CHECK_FAILURE:
2146 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2147 goto skip_fsfstatus;
2148 case FSF_REF_TAG_CHECK_FAILURE:
2149 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2150 goto skip_fsfstatus;
2151 }
2152 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2153 zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2154
2155skip_fsfstatus:
2156 zfcp_fsf_req_trace(req, scpnt);
2157 zfcp_dbf_scsi_result(scpnt, req);
2158
2159 scpnt->host_scribble = NULL;
2160 (scpnt->scsi_done) (scpnt);
2161 /*
2162 * We must hold this lock until scsi_done has been called.
2163 * Otherwise we may call scsi_done after abort regarding this
2164 * command has completed.
2165 * Note: scsi_done must not block!
2166 */
2167 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2168}
2169
2170static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2171{
2172 switch (scsi_get_prot_op(scsi_cmnd)) {
2173 case SCSI_PROT_NORMAL:
2174 switch (scsi_cmnd->sc_data_direction) {
2175 case DMA_NONE:
2176 *data_dir = FSF_DATADIR_CMND;
2177 break;
2178 case DMA_FROM_DEVICE:
2179 *data_dir = FSF_DATADIR_READ;
2180 break;
2181 case DMA_TO_DEVICE:
2182 *data_dir = FSF_DATADIR_WRITE;
2183 break;
2184 case DMA_BIDIRECTIONAL:
2185 return -EINVAL;
2186 }
2187 break;
2188
2189 case SCSI_PROT_READ_STRIP:
2190 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2191 break;
2192 case SCSI_PROT_WRITE_INSERT:
2193 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2194 break;
2195 case SCSI_PROT_READ_PASS:
2196 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2197 break;
2198 case SCSI_PROT_WRITE_PASS:
2199 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2200 break;
2201 default:
2202 return -EINVAL;
2203 }
2204
2205 return 0;
2206}
2207
2208/**
2209 * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2210 * @scsi_cmnd: scsi command to be sent
2211 */
2212int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2213{
2214 struct zfcp_fsf_req *req;
2215 struct fcp_cmnd *fcp_cmnd;
2216 u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
2217 int retval = -EIO;
2218 struct scsi_device *sdev = scsi_cmnd->device;
2219 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2220 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2221 struct zfcp_qdio *qdio = adapter->qdio;
2222 struct fsf_qtcb_bottom_io *io;
2223 unsigned long flags;
2224
2225 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2226 ZFCP_STATUS_COMMON_UNBLOCKED)))
2227 return -EBUSY;
2228
2229 spin_lock_irqsave(&qdio->req_q_lock, flags);
2230 if (atomic_read(&qdio->req_q_free) <= 0) {
2231 atomic_inc(&qdio->req_q_full);
2232 goto out;
2233 }
2234
2235 if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2236 sbtype = SBAL_SFLAGS0_TYPE_WRITE;
2237
2238 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2239 sbtype, adapter->pool.scsi_req);
2240
2241 if (IS_ERR(req)) {
2242 retval = PTR_ERR(req);
2243 goto out;
2244 }
2245
2246 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2247
2248 io = &req->qtcb->bottom.io;
2249 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2250 req->data = scsi_cmnd;
2251 req->handler = zfcp_fsf_fcp_cmnd_handler;
2252 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2253 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2254 io->service_class = FSF_CLASS_3;
2255 io->fcp_cmnd_length = FCP_CMND_LEN;
2256
2257 if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2258 io->data_block_length = scsi_cmnd->device->sector_size;
2259 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2260 }
2261
2262 if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction))
2263 goto failed_scsi_cmnd;
2264
2265 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2266 zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd, 0);
2267
2268 if (scsi_prot_sg_count(scsi_cmnd)) {
2269 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2270 scsi_prot_sg_count(scsi_cmnd));
2271 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2272 scsi_prot_sglist(scsi_cmnd));
2273 if (retval)
2274 goto failed_scsi_cmnd;
2275 io->prot_data_length = zfcp_qdio_real_bytes(
2276 scsi_prot_sglist(scsi_cmnd));
2277 }
2278
2279 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2280 scsi_sglist(scsi_cmnd));
2281 if (unlikely(retval))
2282 goto failed_scsi_cmnd;
2283
2284 zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2285 if (zfcp_adapter_multi_buffer_active(adapter))
2286 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2287
2288 retval = zfcp_fsf_req_send(req);
2289 if (unlikely(retval))
2290 goto failed_scsi_cmnd;
2291
2292 goto out;
2293
2294failed_scsi_cmnd:
2295 zfcp_fsf_req_free(req);
2296 scsi_cmnd->host_scribble = NULL;
2297out:
2298 spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2299 return retval;
2300}
2301
2302static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2303{
2304 struct fcp_resp_with_ext *fcp_rsp;
2305 struct fcp_resp_rsp_info *rsp_info;
2306
2307 zfcp_fsf_fcp_handler_common(req);
2308
2309 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2310 rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2311
2312 if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2313 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2314 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2315}
2316
2317/**
2318 * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
2319 * @scmnd: SCSI command to send the task management command for
2320 * @tm_flags: unsigned byte for task management flags
2321 * Returns: on success pointer to struct fsf_req, NULL otherwise
2322 */
2323struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
2324 u8 tm_flags)
2325{
2326 struct zfcp_fsf_req *req = NULL;
2327 struct fcp_cmnd *fcp_cmnd;
2328 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
2329 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2330
2331 if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2332 ZFCP_STATUS_COMMON_UNBLOCKED)))
2333 return NULL;
2334
2335 spin_lock_irq(&qdio->req_q_lock);
2336 if (zfcp_qdio_sbal_get(qdio))
2337 goto out;
2338
2339 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2340 SBAL_SFLAGS0_TYPE_WRITE,
2341 qdio->adapter->pool.scsi_req);
2342
2343 if (IS_ERR(req)) {
2344 req = NULL;
2345 goto out;
2346 }
2347
2348 req->data = scmnd;
2349 req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2350 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2351 req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2352 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2353 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2354 req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2355
2356 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2357
2358 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2359 zfcp_fc_scsi_to_fcp(fcp_cmnd, scmnd, tm_flags);
2360
2361 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2362 if (!zfcp_fsf_req_send(req))
2363 goto out;
2364
2365 zfcp_fsf_req_free(req);
2366 req = NULL;
2367out:
2368 spin_unlock_irq(&qdio->req_q_lock);
2369 return req;
2370}
2371
2372static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2373{
2374}
2375
2376/**
2377 * zfcp_fsf_control_file - control file upload/download
2378 * @adapter: pointer to struct zfcp_adapter
2379 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2380 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2381 */
2382struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2383 struct zfcp_fsf_cfdc *fsf_cfdc)
2384{
2385 struct zfcp_qdio *qdio = adapter->qdio;
2386 struct zfcp_fsf_req *req = NULL;
2387 struct fsf_qtcb_bottom_support *bottom;
2388 int retval = -EIO;
2389 u8 direction;
2390
2391 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2392 return ERR_PTR(-EOPNOTSUPP);
2393
2394 switch (fsf_cfdc->command) {
2395 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2396 direction = SBAL_SFLAGS0_TYPE_WRITE;
2397 break;
2398 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2399 direction = SBAL_SFLAGS0_TYPE_READ;
2400 break;
2401 default:
2402 return ERR_PTR(-EINVAL);
2403 }
2404
2405 spin_lock_irq(&qdio->req_q_lock);
2406 if (zfcp_qdio_sbal_get(qdio))
2407 goto out;
2408
2409 req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, direction, NULL);
2410 if (IS_ERR(req)) {
2411 retval = -EPERM;
2412 goto out;
2413 }
2414
2415 req->handler = zfcp_fsf_control_file_handler;
2416
2417 bottom = &req->qtcb->bottom.support;
2418 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2419 bottom->option = fsf_cfdc->option;
2420
2421 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, fsf_cfdc->sg);
2422
2423 if (retval ||
2424 (zfcp_qdio_real_bytes(fsf_cfdc->sg) != ZFCP_CFDC_MAX_SIZE)) {
2425 zfcp_fsf_req_free(req);
2426 retval = -EIO;
2427 goto out;
2428 }
2429 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2430 if (zfcp_adapter_multi_buffer_active(adapter))
2431 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2432
2433 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2434 retval = zfcp_fsf_req_send(req);
2435out:
2436 spin_unlock_irq(&qdio->req_q_lock);
2437
2438 if (!retval) {
2439 wait_for_completion(&req->completion);
2440 return req;
2441 }
2442 return ERR_PTR(retval);
2443}
2444
2445/**
2446 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2447 * @adapter: pointer to struct zfcp_adapter
2448 * @sbal_idx: response queue index of SBAL to be processed
2449 */
2450void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2451{
2452 struct zfcp_adapter *adapter = qdio->adapter;
2453 struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2454 struct qdio_buffer_element *sbale;
2455 struct zfcp_fsf_req *fsf_req;
2456 unsigned long req_id;
2457 int idx;
2458
2459 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2460
2461 sbale = &sbal->element[idx];
2462 req_id = (unsigned long) sbale->addr;
2463 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2464
2465 if (!fsf_req) {
2466 /*
2467 * Unknown request means that we have potentially memory
2468 * corruption and must stop the machine immediately.
2469 */
2470 zfcp_qdio_siosl(adapter);
2471 panic("error: unknown req_id (%lx) on adapter %s.\n",
2472 req_id, dev_name(&adapter->ccw_device->dev));
2473 }
2474
2475 fsf_req->qdio_req.sbal_response = sbal_idx;
2476 zfcp_fsf_req_complete(fsf_req);
2477
2478 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
2479 break;
2480 }
2481}
2482
2483struct zfcp_fsf_req *zfcp_fsf_get_req(struct zfcp_qdio *qdio,
2484 struct qdio_buffer *sbal)
2485{
2486 struct qdio_buffer_element *sbale = &sbal->element[0];
2487 u64 req_id = (unsigned long) sbale->addr;
2488
2489 return zfcp_reqlist_find(qdio->adapter->req_list, req_id);
2490}
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