4 * Debug traces for zfcp.
6 * Copyright IBM Corp. 2002, 2018
9 #define KMSG_COMPONENT "zfcp"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12 #include <linux/module.h>
13 #include <linux/ctype.h>
14 #include <linux/slab.h>
15 #include <asm/debug.h>
20 static u32 dbfsize = 4;
22 module_param(dbfsize, uint, 0400);
23 MODULE_PARM_DESC(dbfsize,
24 "number of pages for each debug feature area (default 4)");
26 static u32 dbflevel = 3;
28 module_param(dbflevel, uint, 0400);
29 MODULE_PARM_DESC(dbflevel,
30 "log level for each debug feature area "
31 "(default 3, range 0..6)");
33 static inline unsigned int zfcp_dbf_plen(unsigned int offset)
35 return sizeof(struct zfcp_dbf_pay) + offset - ZFCP_DBF_PAY_MAX_REC;
39 void zfcp_dbf_pl_write(struct zfcp_dbf *dbf, void *data, u16 length, char *area,
42 struct zfcp_dbf_pay *pl = &dbf->pay_buf;
43 u16 offset = 0, rec_length;
45 spin_lock(&dbf->pay_lock);
46 memset(pl, 0, sizeof(*pl));
47 pl->fsf_req_id = req_id;
48 memcpy(pl->area, area, ZFCP_DBF_TAG_LEN);
50 while (offset < length) {
51 rec_length = min((u16) ZFCP_DBF_PAY_MAX_REC,
52 (u16) (length - offset));
53 memcpy(pl->data, data + offset, rec_length);
54 debug_event(dbf->pay, 1, pl, zfcp_dbf_plen(rec_length));
60 spin_unlock(&dbf->pay_lock);
64 * zfcp_dbf_hba_fsf_res - trace event for fsf responses
65 * @tag: tag indicating which kind of unsolicited status has been received
66 * @req: request for which a response was received
68 void zfcp_dbf_hba_fsf_res(char *tag, int level, struct zfcp_fsf_req *req)
70 struct zfcp_dbf *dbf = req->adapter->dbf;
71 struct fsf_qtcb_prefix *q_pref = &req->qtcb->prefix;
72 struct fsf_qtcb_header *q_head = &req->qtcb->header;
73 struct zfcp_dbf_hba *rec = &dbf->hba_buf;
76 spin_lock_irqsave(&dbf->hba_lock, flags);
77 memset(rec, 0, sizeof(*rec));
79 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
80 rec->id = ZFCP_DBF_HBA_RES;
81 rec->fsf_req_id = req->req_id;
82 rec->fsf_req_status = req->status;
83 rec->fsf_cmd = req->fsf_command;
84 rec->fsf_seq_no = req->seq_no;
85 rec->u.res.req_issued = req->issued;
86 rec->u.res.prot_status = q_pref->prot_status;
87 rec->u.res.fsf_status = q_head->fsf_status;
88 rec->u.res.port_handle = q_head->port_handle;
89 rec->u.res.lun_handle = q_head->lun_handle;
91 memcpy(rec->u.res.prot_status_qual, &q_pref->prot_status_qual,
92 FSF_PROT_STATUS_QUAL_SIZE);
93 memcpy(rec->u.res.fsf_status_qual, &q_head->fsf_status_qual,
94 FSF_STATUS_QUALIFIER_SIZE);
96 rec->pl_len = q_head->log_length;
97 zfcp_dbf_pl_write(dbf, (char *)q_pref + q_head->log_start,
98 rec->pl_len, "fsf_res", req->req_id);
100 debug_event(dbf->hba, level, rec, sizeof(*rec));
101 spin_unlock_irqrestore(&dbf->hba_lock, flags);
105 * zfcp_dbf_hba_fsf_uss - trace event for an unsolicited status buffer
106 * @tag: tag indicating which kind of unsolicited status has been received
107 * @req: request providing the unsolicited status
109 void zfcp_dbf_hba_fsf_uss(char *tag, struct zfcp_fsf_req *req)
111 struct zfcp_dbf *dbf = req->adapter->dbf;
112 struct fsf_status_read_buffer *srb = req->data;
113 struct zfcp_dbf_hba *rec = &dbf->hba_buf;
116 spin_lock_irqsave(&dbf->hba_lock, flags);
117 memset(rec, 0, sizeof(*rec));
119 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
120 rec->id = ZFCP_DBF_HBA_USS;
121 rec->fsf_req_id = req->req_id;
122 rec->fsf_req_status = req->status;
123 rec->fsf_cmd = req->fsf_command;
128 rec->u.uss.status_type = srb->status_type;
129 rec->u.uss.status_subtype = srb->status_subtype;
130 rec->u.uss.d_id = ntoh24(srb->d_id);
131 rec->u.uss.lun = srb->fcp_lun;
132 memcpy(&rec->u.uss.queue_designator, &srb->queue_designator,
133 sizeof(rec->u.uss.queue_designator));
135 /* status read buffer payload length */
136 rec->pl_len = (!srb->length) ? 0 : srb->length -
137 offsetof(struct fsf_status_read_buffer, payload);
140 zfcp_dbf_pl_write(dbf, srb->payload.data, rec->pl_len,
141 "fsf_uss", req->req_id);
143 debug_event(dbf->hba, 2, rec, sizeof(*rec));
144 spin_unlock_irqrestore(&dbf->hba_lock, flags);
148 * zfcp_dbf_hba_bit_err - trace event for bit error conditions
149 * @tag: tag indicating which kind of unsolicited status has been received
150 * @req: request which caused the bit_error condition
152 void zfcp_dbf_hba_bit_err(char *tag, struct zfcp_fsf_req *req)
154 struct zfcp_dbf *dbf = req->adapter->dbf;
155 struct zfcp_dbf_hba *rec = &dbf->hba_buf;
156 struct fsf_status_read_buffer *sr_buf = req->data;
159 spin_lock_irqsave(&dbf->hba_lock, flags);
160 memset(rec, 0, sizeof(*rec));
162 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
163 rec->id = ZFCP_DBF_HBA_BIT;
164 rec->fsf_req_id = req->req_id;
165 rec->fsf_req_status = req->status;
166 rec->fsf_cmd = req->fsf_command;
167 memcpy(&rec->u.be, &sr_buf->payload.bit_error,
168 sizeof(struct fsf_bit_error_payload));
170 debug_event(dbf->hba, 1, rec, sizeof(*rec));
171 spin_unlock_irqrestore(&dbf->hba_lock, flags);
175 * zfcp_dbf_hba_def_err - trace event for deferred error messages
176 * @adapter: pointer to struct zfcp_adapter
177 * @req_id: request id which caused the deferred error message
178 * @scount: number of sbals incl. the signaling sbal
179 * @pl: array of all involved sbals
181 void zfcp_dbf_hba_def_err(struct zfcp_adapter *adapter, u64 req_id, u16 scount,
184 struct zfcp_dbf *dbf = adapter->dbf;
185 struct zfcp_dbf_pay *payload = &dbf->pay_buf;
192 spin_lock_irqsave(&dbf->pay_lock, flags);
193 memset(payload, 0, sizeof(*payload));
195 memcpy(payload->area, "def_err", 7);
196 payload->fsf_req_id = req_id;
197 payload->counter = 0;
198 length = min((u16)sizeof(struct qdio_buffer),
199 (u16)ZFCP_DBF_PAY_MAX_REC);
201 while (payload->counter < scount && (char *)pl[payload->counter]) {
202 memcpy(payload->data, (char *)pl[payload->counter], length);
203 debug_event(dbf->pay, 1, payload, zfcp_dbf_plen(length));
207 spin_unlock_irqrestore(&dbf->pay_lock, flags);
211 * zfcp_dbf_hba_basic - trace event for basic adapter events
212 * @adapter: pointer to struct zfcp_adapter
214 void zfcp_dbf_hba_basic(char *tag, struct zfcp_adapter *adapter)
216 struct zfcp_dbf *dbf = adapter->dbf;
217 struct zfcp_dbf_hba *rec = &dbf->hba_buf;
220 spin_lock_irqsave(&dbf->hba_lock, flags);
221 memset(rec, 0, sizeof(*rec));
223 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
224 rec->id = ZFCP_DBF_HBA_BASIC;
226 debug_event(dbf->hba, 1, rec, sizeof(*rec));
227 spin_unlock_irqrestore(&dbf->hba_lock, flags);
230 static void zfcp_dbf_set_common(struct zfcp_dbf_rec *rec,
231 struct zfcp_adapter *adapter,
232 struct zfcp_port *port,
233 struct scsi_device *sdev)
235 rec->adapter_status = atomic_read(&adapter->status);
237 rec->port_status = atomic_read(&port->status);
238 rec->wwpn = port->wwpn;
239 rec->d_id = port->d_id;
242 rec->lun_status = atomic_read(&sdev_to_zfcp(sdev)->status);
243 rec->lun = zfcp_scsi_dev_lun(sdev);
245 rec->lun = ZFCP_DBF_INVALID_LUN;
249 * zfcp_dbf_rec_trig - trace event related to triggered recovery
250 * @tag: identifier for event
251 * @adapter: adapter on which the erp_action should run
252 * @port: remote port involved in the erp_action
253 * @sdev: scsi device involved in the erp_action
254 * @want: wanted erp_action
255 * @need: required erp_action
257 * The adapter->erp_lock has to be held.
259 void zfcp_dbf_rec_trig(char *tag, struct zfcp_adapter *adapter,
260 struct zfcp_port *port, struct scsi_device *sdev,
263 struct zfcp_dbf *dbf = adapter->dbf;
264 struct zfcp_dbf_rec *rec = &dbf->rec_buf;
265 struct list_head *entry;
268 spin_lock_irqsave(&dbf->rec_lock, flags);
269 memset(rec, 0, sizeof(*rec));
271 rec->id = ZFCP_DBF_REC_TRIG;
272 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
273 zfcp_dbf_set_common(rec, adapter, port, sdev);
275 list_for_each(entry, &adapter->erp_ready_head)
278 list_for_each(entry, &adapter->erp_running_head)
279 rec->u.trig.running++;
281 rec->u.trig.want = want;
282 rec->u.trig.need = need;
284 debug_event(dbf->rec, 1, rec, sizeof(*rec));
285 spin_unlock_irqrestore(&dbf->rec_lock, flags);
289 * zfcp_dbf_rec_trig_lock - trace event related to triggered recovery with lock
290 * @tag: identifier for event
291 * @adapter: adapter on which the erp_action should run
292 * @port: remote port involved in the erp_action
293 * @sdev: scsi device involved in the erp_action
294 * @want: wanted erp_action
295 * @need: required erp_action
297 * The adapter->erp_lock must not be held.
299 void zfcp_dbf_rec_trig_lock(char *tag, struct zfcp_adapter *adapter,
300 struct zfcp_port *port, struct scsi_device *sdev,
305 read_lock_irqsave(&adapter->erp_lock, flags);
306 zfcp_dbf_rec_trig(tag, adapter, port, sdev, want, need);
307 read_unlock_irqrestore(&adapter->erp_lock, flags);
311 * zfcp_dbf_rec_run_lvl - trace event related to running recovery
312 * @level: trace level to be used for event
313 * @tag: identifier for event
314 * @erp: erp_action running
316 void zfcp_dbf_rec_run_lvl(int level, char *tag, struct zfcp_erp_action *erp)
318 struct zfcp_dbf *dbf = erp->adapter->dbf;
319 struct zfcp_dbf_rec *rec = &dbf->rec_buf;
322 spin_lock_irqsave(&dbf->rec_lock, flags);
323 memset(rec, 0, sizeof(*rec));
325 rec->id = ZFCP_DBF_REC_RUN;
326 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
327 zfcp_dbf_set_common(rec, erp->adapter, erp->port, erp->sdev);
329 rec->u.run.fsf_req_id = erp->fsf_req_id;
330 rec->u.run.rec_status = erp->status;
331 rec->u.run.rec_step = erp->step;
332 rec->u.run.rec_action = erp->action;
335 rec->u.run.rec_count =
336 atomic_read(&sdev_to_zfcp(erp->sdev)->erp_counter);
338 rec->u.run.rec_count = atomic_read(&erp->port->erp_counter);
340 rec->u.run.rec_count = atomic_read(&erp->adapter->erp_counter);
342 debug_event(dbf->rec, level, rec, sizeof(*rec));
343 spin_unlock_irqrestore(&dbf->rec_lock, flags);
347 * zfcp_dbf_rec_run - trace event related to running recovery
348 * @tag: identifier for event
349 * @erp: erp_action running
351 void zfcp_dbf_rec_run(char *tag, struct zfcp_erp_action *erp)
353 zfcp_dbf_rec_run_lvl(1, tag, erp);
357 * zfcp_dbf_rec_run_wka - trace wka port event with info like running recovery
358 * @tag: identifier for event
359 * @wka_port: well known address port
360 * @req_id: request ID to correlate with potential HBA trace record
362 void zfcp_dbf_rec_run_wka(char *tag, struct zfcp_fc_wka_port *wka_port,
365 struct zfcp_dbf *dbf = wka_port->adapter->dbf;
366 struct zfcp_dbf_rec *rec = &dbf->rec_buf;
369 spin_lock_irqsave(&dbf->rec_lock, flags);
370 memset(rec, 0, sizeof(*rec));
372 rec->id = ZFCP_DBF_REC_RUN;
373 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
374 rec->port_status = wka_port->status;
375 rec->d_id = wka_port->d_id;
376 rec->lun = ZFCP_DBF_INVALID_LUN;
378 rec->u.run.fsf_req_id = req_id;
379 rec->u.run.rec_status = ~0;
380 rec->u.run.rec_step = ~0;
381 rec->u.run.rec_action = ~0;
382 rec->u.run.rec_count = ~0;
384 debug_event(dbf->rec, 1, rec, sizeof(*rec));
385 spin_unlock_irqrestore(&dbf->rec_lock, flags);
389 void zfcp_dbf_san(char *tag, struct zfcp_dbf *dbf,
390 char *paytag, struct scatterlist *sg, u8 id, u16 len,
391 u64 req_id, u32 d_id, u16 cap_len)
393 struct zfcp_dbf_san *rec = &dbf->san_buf;
396 struct zfcp_dbf_pay *payload = &dbf->pay_buf;
399 spin_lock_irqsave(&dbf->san_lock, flags);
400 memset(rec, 0, sizeof(*rec));
403 rec->fsf_req_id = req_id;
405 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
406 rec->pl_len = len; /* full length even if we cap pay below */
409 rec_len = min_t(unsigned int, sg->length, ZFCP_DBF_SAN_MAX_PAYLOAD);
410 memcpy(rec->payload, sg_virt(sg), rec_len); /* part of 1st sg entry */
412 goto out; /* skip pay record if full content in rec->payload */
414 /* if (len > rec_len):
415 * dump data up to cap_len ignoring small duplicate in rec->payload
417 spin_lock(&dbf->pay_lock);
418 memset(payload, 0, sizeof(*payload));
419 memcpy(payload->area, paytag, ZFCP_DBF_TAG_LEN);
420 payload->fsf_req_id = req_id;
421 payload->counter = 0;
422 for (; sg && pay_sum < cap_len; sg = sg_next(sg)) {
423 u16 pay_len, offset = 0;
425 while (offset < sg->length && pay_sum < cap_len) {
426 pay_len = min((u16)ZFCP_DBF_PAY_MAX_REC,
427 (u16)(sg->length - offset));
428 /* cap_len <= pay_sum < cap_len+ZFCP_DBF_PAY_MAX_REC */
429 memcpy(payload->data, sg_virt(sg) + offset, pay_len);
430 debug_event(dbf->pay, 1, payload,
431 zfcp_dbf_plen(pay_len));
437 spin_unlock(&dbf->pay_lock);
440 debug_event(dbf->san, 1, rec, sizeof(*rec));
441 spin_unlock_irqrestore(&dbf->san_lock, flags);
445 * zfcp_dbf_san_req - trace event for issued SAN request
446 * @tag: identifier for event
447 * @fsf_req: request containing issued CT data
448 * d_id: destination ID
450 void zfcp_dbf_san_req(char *tag, struct zfcp_fsf_req *fsf, u32 d_id)
452 struct zfcp_dbf *dbf = fsf->adapter->dbf;
453 struct zfcp_fsf_ct_els *ct_els = fsf->data;
456 length = (u16)zfcp_qdio_real_bytes(ct_els->req);
457 zfcp_dbf_san(tag, dbf, "san_req", ct_els->req, ZFCP_DBF_SAN_REQ,
458 length, fsf->req_id, d_id, length);
461 static u16 zfcp_dbf_san_res_cap_len_if_gpn_ft(char *tag,
462 struct zfcp_fsf_req *fsf,
465 struct zfcp_fsf_ct_els *ct_els = fsf->data;
466 struct fc_ct_hdr *reqh = sg_virt(ct_els->req);
467 struct fc_ns_gid_ft *reqn = (struct fc_ns_gid_ft *)(reqh + 1);
468 struct scatterlist *resp_entry = ct_els->resp;
469 struct fc_ct_hdr *resph;
470 struct fc_gpn_ft_resp *acc;
471 int max_entries, x, last = 0;
473 if (!(memcmp(tag, "fsscth2", 7) == 0
474 && ct_els->d_id == FC_FID_DIR_SERV
475 && reqh->ct_rev == FC_CT_REV
476 && reqh->ct_in_id[0] == 0
477 && reqh->ct_in_id[1] == 0
478 && reqh->ct_in_id[2] == 0
479 && reqh->ct_fs_type == FC_FST_DIR
480 && reqh->ct_fs_subtype == FC_NS_SUBTYPE
481 && reqh->ct_options == 0
482 && reqh->_ct_resvd1 == 0
483 && reqh->ct_cmd == FC_NS_GPN_FT
484 /* reqh->ct_mr_size can vary so do not match but read below */
485 && reqh->_ct_resvd2 == 0
486 && reqh->ct_reason == 0
487 && reqh->ct_explan == 0
488 && reqh->ct_vendor == 0
489 && reqn->fn_resvd == 0
490 && reqn->fn_domain_id_scope == 0
491 && reqn->fn_area_id_scope == 0
492 && reqn->fn_fc4_type == FC_TYPE_FCP))
493 return len; /* not GPN_FT response so do not cap */
495 acc = sg_virt(resp_entry);
497 /* cap all but accept CT responses to at least the CT header */
498 resph = (struct fc_ct_hdr *)acc;
499 if ((ct_els->status) ||
500 (resph->ct_cmd != cpu_to_be16(FC_FS_ACC)))
501 return max(FC_CT_HDR_LEN, ZFCP_DBF_SAN_MAX_PAYLOAD);
503 max_entries = (reqh->ct_mr_size * 4 / sizeof(struct fc_gpn_ft_resp))
504 + 1 /* zfcp_fc_scan_ports: bytes correct, entries off-by-one
505 * to account for header as 1st pseudo "entry" */;
507 /* the basic CT_IU preamble is the same size as one entry in the GPN_FT
508 * response, allowing us to skip special handling for it - just skip it
510 for (x = 1; x < max_entries && !last; x++) {
511 if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1))
514 acc = sg_virt(++resp_entry);
516 last = acc->fp_flags & FC_NS_FID_LAST;
518 len = min(len, (u16)(x * sizeof(struct fc_gpn_ft_resp)));
519 return len; /* cap after last entry */
523 * zfcp_dbf_san_res - trace event for received SAN request
524 * @tag: identifier for event
525 * @fsf_req: request containing issued CT data
527 void zfcp_dbf_san_res(char *tag, struct zfcp_fsf_req *fsf)
529 struct zfcp_dbf *dbf = fsf->adapter->dbf;
530 struct zfcp_fsf_ct_els *ct_els = fsf->data;
533 length = (u16)zfcp_qdio_real_bytes(ct_els->resp);
534 zfcp_dbf_san(tag, dbf, "san_res", ct_els->resp, ZFCP_DBF_SAN_RES,
535 length, fsf->req_id, ct_els->d_id,
536 zfcp_dbf_san_res_cap_len_if_gpn_ft(tag, fsf, length));
540 * zfcp_dbf_san_in_els - trace event for incoming ELS
541 * @tag: identifier for event
542 * @fsf_req: request containing issued CT data
544 void zfcp_dbf_san_in_els(char *tag, struct zfcp_fsf_req *fsf)
546 struct zfcp_dbf *dbf = fsf->adapter->dbf;
547 struct fsf_status_read_buffer *srb =
548 (struct fsf_status_read_buffer *) fsf->data;
550 struct scatterlist sg;
552 length = (u16)(srb->length -
553 offsetof(struct fsf_status_read_buffer, payload));
554 sg_init_one(&sg, srb->payload.data, length);
555 zfcp_dbf_san(tag, dbf, "san_els", &sg, ZFCP_DBF_SAN_ELS, length,
556 fsf->req_id, ntoh24(srb->d_id), length);
560 * zfcp_dbf_scsi - trace event for scsi commands
561 * @tag: identifier for event
562 * @sc: pointer to struct scsi_cmnd
563 * @fsf: pointer to struct zfcp_fsf_req
565 void zfcp_dbf_scsi(char *tag, int level, struct scsi_cmnd *sc,
566 struct zfcp_fsf_req *fsf)
568 struct zfcp_adapter *adapter =
569 (struct zfcp_adapter *) sc->device->host->hostdata[0];
570 struct zfcp_dbf *dbf = adapter->dbf;
571 struct zfcp_dbf_scsi *rec = &dbf->scsi_buf;
572 struct fcp_resp_with_ext *fcp_rsp;
573 struct fcp_resp_rsp_info *fcp_rsp_info;
576 spin_lock_irqsave(&dbf->scsi_lock, flags);
577 memset(rec, 0, sizeof(*rec));
579 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
580 rec->id = ZFCP_DBF_SCSI_CMND;
581 rec->scsi_result = sc->result;
582 rec->scsi_retries = sc->retries;
583 rec->scsi_allowed = sc->allowed;
584 rec->scsi_id = sc->device->id;
585 rec->scsi_lun = (u32)sc->device->lun;
586 rec->scsi_lun_64_hi = (u32)(sc->device->lun >> 32);
587 rec->host_scribble = (unsigned long)sc->host_scribble;
589 memcpy(rec->scsi_opcode, sc->cmnd,
590 min((int)sc->cmd_len, ZFCP_DBF_SCSI_OPCODE));
593 rec->fsf_req_id = fsf->req_id;
594 rec->pl_len = FCP_RESP_WITH_EXT;
595 fcp_rsp = (struct fcp_resp_with_ext *)
596 &(fsf->qtcb->bottom.io.fcp_rsp);
597 /* mandatory parts of FCP_RSP IU in this SCSI record */
598 memcpy(&rec->fcp_rsp, fcp_rsp, FCP_RESP_WITH_EXT);
599 if (fcp_rsp->resp.fr_flags & FCP_RSP_LEN_VAL) {
600 fcp_rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
601 rec->fcp_rsp_info = fcp_rsp_info->rsp_code;
602 rec->pl_len += be32_to_cpu(fcp_rsp->ext.fr_rsp_len);
604 if (fcp_rsp->resp.fr_flags & FCP_SNS_LEN_VAL) {
605 rec->pl_len += be32_to_cpu(fcp_rsp->ext.fr_sns_len);
607 /* complete FCP_RSP IU in associated PAYload record
608 * but only if there are optional parts
610 if (fcp_rsp->resp.fr_flags != 0)
613 /* at least one full PAY record
614 * but not beyond hardware response field
616 min_t(u16, max_t(u16, rec->pl_len,
617 ZFCP_DBF_PAY_MAX_REC),
619 "fcp_riu", fsf->req_id);
622 debug_event(dbf->scsi, level, rec, sizeof(*rec));
623 spin_unlock_irqrestore(&dbf->scsi_lock, flags);
627 * zfcp_dbf_scsi_eh() - Trace event for special cases of scsi_eh callbacks.
628 * @tag: Identifier for event.
629 * @adapter: Pointer to zfcp adapter as context for this event.
630 * @scsi_id: SCSI ID/target to indicate scope of task management function (TMF).
631 * @ret: Return value of calling function.
633 * This SCSI trace variant does not depend on any of:
634 * scsi_cmnd, zfcp_fsf_req, scsi_device.
636 void zfcp_dbf_scsi_eh(char *tag, struct zfcp_adapter *adapter,
637 unsigned int scsi_id, int ret)
639 struct zfcp_dbf *dbf = adapter->dbf;
640 struct zfcp_dbf_scsi *rec = &dbf->scsi_buf;
642 static int const level = 1;
644 if (unlikely(!debug_level_enabled(adapter->dbf->scsi, level)))
647 spin_lock_irqsave(&dbf->scsi_lock, flags);
648 memset(rec, 0, sizeof(*rec));
650 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
651 rec->id = ZFCP_DBF_SCSI_CMND;
652 rec->scsi_result = ret; /* re-use field, int is 4 bytes and fits */
653 rec->scsi_retries = ~0;
654 rec->scsi_allowed = ~0;
655 rec->fcp_rsp_info = ~0;
656 rec->scsi_id = scsi_id;
657 rec->scsi_lun = (u32)ZFCP_DBF_INVALID_LUN;
658 rec->scsi_lun_64_hi = (u32)(ZFCP_DBF_INVALID_LUN >> 32);
659 rec->host_scribble = ~0;
660 memset(rec->scsi_opcode, 0xff, ZFCP_DBF_SCSI_OPCODE);
662 debug_event(dbf->scsi, level, rec, sizeof(*rec));
663 spin_unlock_irqrestore(&dbf->scsi_lock, flags);
666 static debug_info_t *zfcp_dbf_reg(const char *name, int size, int rec_size)
668 struct debug_info *d;
670 d = debug_register(name, size, 1, rec_size);
674 debug_register_view(d, &debug_hex_ascii_view);
675 debug_set_level(d, dbflevel);
680 static void zfcp_dbf_unregister(struct zfcp_dbf *dbf)
685 debug_unregister(dbf->scsi);
686 debug_unregister(dbf->san);
687 debug_unregister(dbf->hba);
688 debug_unregister(dbf->pay);
689 debug_unregister(dbf->rec);
694 * zfcp_adapter_debug_register - registers debug feature for an adapter
695 * @adapter: pointer to adapter for which debug features should be registered
696 * return: -ENOMEM on error, 0 otherwise
698 int zfcp_dbf_adapter_register(struct zfcp_adapter *adapter)
700 char name[DEBUG_MAX_NAME_LEN];
701 struct zfcp_dbf *dbf;
703 dbf = kzalloc(sizeof(struct zfcp_dbf), GFP_KERNEL);
707 spin_lock_init(&dbf->pay_lock);
708 spin_lock_init(&dbf->hba_lock);
709 spin_lock_init(&dbf->san_lock);
710 spin_lock_init(&dbf->scsi_lock);
711 spin_lock_init(&dbf->rec_lock);
713 /* debug feature area which records recovery activity */
714 sprintf(name, "zfcp_%s_rec", dev_name(&adapter->ccw_device->dev));
715 dbf->rec = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_rec));
719 /* debug feature area which records HBA (FSF and QDIO) conditions */
720 sprintf(name, "zfcp_%s_hba", dev_name(&adapter->ccw_device->dev));
721 dbf->hba = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_hba));
725 /* debug feature area which records payload info */
726 sprintf(name, "zfcp_%s_pay", dev_name(&adapter->ccw_device->dev));
727 dbf->pay = zfcp_dbf_reg(name, dbfsize * 2, sizeof(struct zfcp_dbf_pay));
731 /* debug feature area which records SAN command failures and recovery */
732 sprintf(name, "zfcp_%s_san", dev_name(&adapter->ccw_device->dev));
733 dbf->san = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_san));
737 /* debug feature area which records SCSI command failures and recovery */
738 sprintf(name, "zfcp_%s_scsi", dev_name(&adapter->ccw_device->dev));
739 dbf->scsi = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_scsi));
747 zfcp_dbf_unregister(dbf);
752 * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
753 * @adapter: pointer to adapter for which debug features should be unregistered
755 void zfcp_dbf_adapter_unregister(struct zfcp_adapter *adapter)
757 struct zfcp_dbf *dbf = adapter->dbf;
760 zfcp_dbf_unregister(dbf);