1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * zfcp device driver 4 * 5 * Debug traces for zfcp. 6 * 7 * Copyright IBM Corp. 2002, 2017 8 */ 9 10 #define KMSG_COMPONENT "zfcp" 11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 12 13 #include <linux/module.h> 14 #include <linux/ctype.h> 15 #include <linux/slab.h> 16 #include <asm/debug.h> 17 #include "zfcp_dbf.h" 18 #include "zfcp_ext.h" 19 #include "zfcp_fc.h" 20 21 static u32 dbfsize = 4; 22 23 module_param(dbfsize, uint, 0400); 24 MODULE_PARM_DESC(dbfsize, 25 "number of pages for each debug feature area (default 4)"); 26 27 static u32 dbflevel = 3; 28 29 module_param(dbflevel, uint, 0400); 30 MODULE_PARM_DESC(dbflevel, 31 "log level for each debug feature area " 32 "(default 3, range 0..6)"); 33 34 static inline unsigned int zfcp_dbf_plen(unsigned int offset) 35 { 36 return sizeof(struct zfcp_dbf_pay) + offset - ZFCP_DBF_PAY_MAX_REC; 37 } 38 39 static inline 40 void zfcp_dbf_pl_write(struct zfcp_dbf *dbf, void *data, u16 length, char *area, 41 u64 req_id) 42 { 43 struct zfcp_dbf_pay *pl = &dbf->pay_buf; 44 u16 offset = 0, rec_length; 45 46 spin_lock(&dbf->pay_lock); 47 memset(pl, 0, sizeof(*pl)); 48 pl->fsf_req_id = req_id; 49 memcpy(pl->area, area, ZFCP_DBF_TAG_LEN); 50 51 while (offset < length) { 52 rec_length = min((u16) ZFCP_DBF_PAY_MAX_REC, 53 (u16) (length - offset)); 54 memcpy(pl->data, data + offset, rec_length); 55 debug_event(dbf->pay, 1, pl, zfcp_dbf_plen(rec_length)); 56 57 offset += rec_length; 58 pl->counter++; 59 } 60 61 spin_unlock(&dbf->pay_lock); 62 } 63 64 /** 65 * zfcp_dbf_hba_fsf_res - trace event for fsf responses 66 * @tag: tag indicating which kind of unsolicited status has been received 67 * @req: request for which a response was received 68 */ 69 void zfcp_dbf_hba_fsf_res(char *tag, int level, struct zfcp_fsf_req *req) 70 { 71 struct zfcp_dbf *dbf = req->adapter->dbf; 72 struct fsf_qtcb_prefix *q_pref = &req->qtcb->prefix; 73 struct fsf_qtcb_header *q_head = &req->qtcb->header; 74 struct zfcp_dbf_hba *rec = &dbf->hba_buf; 75 unsigned long flags; 76 77 spin_lock_irqsave(&dbf->hba_lock, flags); 78 memset(rec, 0, sizeof(*rec)); 79 80 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 81 rec->id = ZFCP_DBF_HBA_RES; 82 rec->fsf_req_id = req->req_id; 83 rec->fsf_req_status = req->status; 84 rec->fsf_cmd = req->fsf_command; 85 rec->fsf_seq_no = req->seq_no; 86 rec->u.res.req_issued = req->issued; 87 rec->u.res.prot_status = q_pref->prot_status; 88 rec->u.res.fsf_status = q_head->fsf_status; 89 rec->u.res.port_handle = q_head->port_handle; 90 rec->u.res.lun_handle = q_head->lun_handle; 91 92 memcpy(rec->u.res.prot_status_qual, &q_pref->prot_status_qual, 93 FSF_PROT_STATUS_QUAL_SIZE); 94 memcpy(rec->u.res.fsf_status_qual, &q_head->fsf_status_qual, 95 FSF_STATUS_QUALIFIER_SIZE); 96 97 if (req->fsf_command != FSF_QTCB_FCP_CMND) { 98 rec->pl_len = q_head->log_length; 99 zfcp_dbf_pl_write(dbf, (char *)q_pref + q_head->log_start, 100 rec->pl_len, "fsf_res", req->req_id); 101 } 102 103 debug_event(dbf->hba, level, rec, sizeof(*rec)); 104 spin_unlock_irqrestore(&dbf->hba_lock, flags); 105 } 106 107 /** 108 * zfcp_dbf_hba_fsf_uss - trace event for an unsolicited status buffer 109 * @tag: tag indicating which kind of unsolicited status has been received 110 * @req: request providing the unsolicited status 111 */ 112 void zfcp_dbf_hba_fsf_uss(char *tag, struct zfcp_fsf_req *req) 113 { 114 struct zfcp_dbf *dbf = req->adapter->dbf; 115 struct fsf_status_read_buffer *srb = req->data; 116 struct zfcp_dbf_hba *rec = &dbf->hba_buf; 117 static int const level = 2; 118 unsigned long flags; 119 120 if (unlikely(!debug_level_enabled(dbf->hba, level))) 121 return; 122 123 spin_lock_irqsave(&dbf->hba_lock, flags); 124 memset(rec, 0, sizeof(*rec)); 125 126 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 127 rec->id = ZFCP_DBF_HBA_USS; 128 rec->fsf_req_id = req->req_id; 129 rec->fsf_req_status = req->status; 130 rec->fsf_cmd = req->fsf_command; 131 132 if (!srb) 133 goto log; 134 135 rec->u.uss.status_type = srb->status_type; 136 rec->u.uss.status_subtype = srb->status_subtype; 137 rec->u.uss.d_id = ntoh24(srb->d_id); 138 rec->u.uss.lun = srb->fcp_lun; 139 memcpy(&rec->u.uss.queue_designator, &srb->queue_designator, 140 sizeof(rec->u.uss.queue_designator)); 141 142 /* status read buffer payload length */ 143 rec->pl_len = (!srb->length) ? 0 : srb->length - 144 offsetof(struct fsf_status_read_buffer, payload); 145 146 if (rec->pl_len) 147 zfcp_dbf_pl_write(dbf, srb->payload.data, rec->pl_len, 148 "fsf_uss", req->req_id); 149 log: 150 debug_event(dbf->hba, level, rec, sizeof(*rec)); 151 spin_unlock_irqrestore(&dbf->hba_lock, flags); 152 } 153 154 /** 155 * zfcp_dbf_hba_bit_err - trace event for bit error conditions 156 * @tag: tag indicating which kind of unsolicited status has been received 157 * @req: request which caused the bit_error condition 158 */ 159 void zfcp_dbf_hba_bit_err(char *tag, struct zfcp_fsf_req *req) 160 { 161 struct zfcp_dbf *dbf = req->adapter->dbf; 162 struct zfcp_dbf_hba *rec = &dbf->hba_buf; 163 struct fsf_status_read_buffer *sr_buf = req->data; 164 static int const level = 1; 165 unsigned long flags; 166 167 if (unlikely(!debug_level_enabled(dbf->hba, level))) 168 return; 169 170 spin_lock_irqsave(&dbf->hba_lock, flags); 171 memset(rec, 0, sizeof(*rec)); 172 173 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 174 rec->id = ZFCP_DBF_HBA_BIT; 175 rec->fsf_req_id = req->req_id; 176 rec->fsf_req_status = req->status; 177 rec->fsf_cmd = req->fsf_command; 178 memcpy(&rec->u.be, &sr_buf->payload.bit_error, 179 sizeof(struct fsf_bit_error_payload)); 180 181 debug_event(dbf->hba, level, rec, sizeof(*rec)); 182 spin_unlock_irqrestore(&dbf->hba_lock, flags); 183 } 184 185 /** 186 * zfcp_dbf_hba_def_err - trace event for deferred error messages 187 * @adapter: pointer to struct zfcp_adapter 188 * @req_id: request id which caused the deferred error message 189 * @scount: number of sbals incl. the signaling sbal 190 * @pl: array of all involved sbals 191 */ 192 void zfcp_dbf_hba_def_err(struct zfcp_adapter *adapter, u64 req_id, u16 scount, 193 void **pl) 194 { 195 struct zfcp_dbf *dbf = adapter->dbf; 196 struct zfcp_dbf_pay *payload = &dbf->pay_buf; 197 unsigned long flags; 198 static int const level = 1; 199 u16 length; 200 201 if (unlikely(!debug_level_enabled(dbf->pay, level))) 202 return; 203 204 if (!pl) 205 return; 206 207 spin_lock_irqsave(&dbf->pay_lock, flags); 208 memset(payload, 0, sizeof(*payload)); 209 210 memcpy(payload->area, "def_err", 7); 211 payload->fsf_req_id = req_id; 212 payload->counter = 0; 213 length = min((u16)sizeof(struct qdio_buffer), 214 (u16)ZFCP_DBF_PAY_MAX_REC); 215 216 while (payload->counter < scount && (char *)pl[payload->counter]) { 217 memcpy(payload->data, (char *)pl[payload->counter], length); 218 debug_event(dbf->pay, level, payload, zfcp_dbf_plen(length)); 219 payload->counter++; 220 } 221 222 spin_unlock_irqrestore(&dbf->pay_lock, flags); 223 } 224 225 /** 226 * zfcp_dbf_hba_basic - trace event for basic adapter events 227 * @adapter: pointer to struct zfcp_adapter 228 */ 229 void zfcp_dbf_hba_basic(char *tag, struct zfcp_adapter *adapter) 230 { 231 struct zfcp_dbf *dbf = adapter->dbf; 232 struct zfcp_dbf_hba *rec = &dbf->hba_buf; 233 static int const level = 1; 234 unsigned long flags; 235 236 if (unlikely(!debug_level_enabled(dbf->hba, level))) 237 return; 238 239 spin_lock_irqsave(&dbf->hba_lock, flags); 240 memset(rec, 0, sizeof(*rec)); 241 242 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 243 rec->id = ZFCP_DBF_HBA_BASIC; 244 245 debug_event(dbf->hba, level, rec, sizeof(*rec)); 246 spin_unlock_irqrestore(&dbf->hba_lock, flags); 247 } 248 249 static void zfcp_dbf_set_common(struct zfcp_dbf_rec *rec, 250 struct zfcp_adapter *adapter, 251 struct zfcp_port *port, 252 struct scsi_device *sdev) 253 { 254 rec->adapter_status = atomic_read(&adapter->status); 255 if (port) { 256 rec->port_status = atomic_read(&port->status); 257 rec->wwpn = port->wwpn; 258 rec->d_id = port->d_id; 259 } 260 if (sdev) { 261 rec->lun_status = atomic_read(&sdev_to_zfcp(sdev)->status); 262 rec->lun = zfcp_scsi_dev_lun(sdev); 263 } else 264 rec->lun = ZFCP_DBF_INVALID_LUN; 265 } 266 267 /** 268 * zfcp_dbf_rec_trig - trace event related to triggered recovery 269 * @tag: identifier for event 270 * @adapter: adapter on which the erp_action should run 271 * @port: remote port involved in the erp_action 272 * @sdev: scsi device involved in the erp_action 273 * @want: wanted erp_action 274 * @need: required erp_action 275 * 276 * The adapter->erp_lock has to be held. 277 */ 278 void zfcp_dbf_rec_trig(char *tag, struct zfcp_adapter *adapter, 279 struct zfcp_port *port, struct scsi_device *sdev, 280 u8 want, u8 need) 281 { 282 struct zfcp_dbf *dbf = adapter->dbf; 283 struct zfcp_dbf_rec *rec = &dbf->rec_buf; 284 static int const level = 1; 285 struct list_head *entry; 286 unsigned long flags; 287 288 if (unlikely(!debug_level_enabled(dbf->rec, level))) 289 return; 290 291 spin_lock_irqsave(&dbf->rec_lock, flags); 292 memset(rec, 0, sizeof(*rec)); 293 294 rec->id = ZFCP_DBF_REC_TRIG; 295 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 296 zfcp_dbf_set_common(rec, adapter, port, sdev); 297 298 list_for_each(entry, &adapter->erp_ready_head) 299 rec->u.trig.ready++; 300 301 list_for_each(entry, &adapter->erp_running_head) 302 rec->u.trig.running++; 303 304 rec->u.trig.want = want; 305 rec->u.trig.need = need; 306 307 debug_event(dbf->rec, level, rec, sizeof(*rec)); 308 spin_unlock_irqrestore(&dbf->rec_lock, flags); 309 } 310 311 312 /** 313 * zfcp_dbf_rec_run_lvl - trace event related to running recovery 314 * @level: trace level to be used for event 315 * @tag: identifier for event 316 * @erp: erp_action running 317 */ 318 void zfcp_dbf_rec_run_lvl(int level, char *tag, struct zfcp_erp_action *erp) 319 { 320 struct zfcp_dbf *dbf = erp->adapter->dbf; 321 struct zfcp_dbf_rec *rec = &dbf->rec_buf; 322 unsigned long flags; 323 324 if (!debug_level_enabled(dbf->rec, level)) 325 return; 326 327 spin_lock_irqsave(&dbf->rec_lock, flags); 328 memset(rec, 0, sizeof(*rec)); 329 330 rec->id = ZFCP_DBF_REC_RUN; 331 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 332 zfcp_dbf_set_common(rec, erp->adapter, erp->port, erp->sdev); 333 334 rec->u.run.fsf_req_id = erp->fsf_req_id; 335 rec->u.run.rec_status = erp->status; 336 rec->u.run.rec_step = erp->step; 337 rec->u.run.rec_action = erp->action; 338 339 if (erp->sdev) 340 rec->u.run.rec_count = 341 atomic_read(&sdev_to_zfcp(erp->sdev)->erp_counter); 342 else if (erp->port) 343 rec->u.run.rec_count = atomic_read(&erp->port->erp_counter); 344 else 345 rec->u.run.rec_count = atomic_read(&erp->adapter->erp_counter); 346 347 debug_event(dbf->rec, level, rec, sizeof(*rec)); 348 spin_unlock_irqrestore(&dbf->rec_lock, flags); 349 } 350 351 /** 352 * zfcp_dbf_rec_run - trace event related to running recovery 353 * @tag: identifier for event 354 * @erp: erp_action running 355 */ 356 void zfcp_dbf_rec_run(char *tag, struct zfcp_erp_action *erp) 357 { 358 zfcp_dbf_rec_run_lvl(1, tag, erp); 359 } 360 361 /** 362 * zfcp_dbf_rec_run_wka - trace wka port event with info like running recovery 363 * @tag: identifier for event 364 * @wka_port: well known address port 365 * @req_id: request ID to correlate with potential HBA trace record 366 */ 367 void zfcp_dbf_rec_run_wka(char *tag, struct zfcp_fc_wka_port *wka_port, 368 u64 req_id) 369 { 370 struct zfcp_dbf *dbf = wka_port->adapter->dbf; 371 struct zfcp_dbf_rec *rec = &dbf->rec_buf; 372 static int const level = 1; 373 unsigned long flags; 374 375 if (unlikely(!debug_level_enabled(dbf->rec, level))) 376 return; 377 378 spin_lock_irqsave(&dbf->rec_lock, flags); 379 memset(rec, 0, sizeof(*rec)); 380 381 rec->id = ZFCP_DBF_REC_RUN; 382 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 383 rec->port_status = wka_port->status; 384 rec->d_id = wka_port->d_id; 385 rec->lun = ZFCP_DBF_INVALID_LUN; 386 387 rec->u.run.fsf_req_id = req_id; 388 rec->u.run.rec_status = ~0; 389 rec->u.run.rec_step = ~0; 390 rec->u.run.rec_action = ~0; 391 rec->u.run.rec_count = ~0; 392 393 debug_event(dbf->rec, level, rec, sizeof(*rec)); 394 spin_unlock_irqrestore(&dbf->rec_lock, flags); 395 } 396 397 #define ZFCP_DBF_SAN_LEVEL 1 398 399 static inline 400 void zfcp_dbf_san(char *tag, struct zfcp_dbf *dbf, 401 char *paytag, struct scatterlist *sg, u8 id, u16 len, 402 u64 req_id, u32 d_id, u16 cap_len) 403 { 404 struct zfcp_dbf_san *rec = &dbf->san_buf; 405 u16 rec_len; 406 unsigned long flags; 407 struct zfcp_dbf_pay *payload = &dbf->pay_buf; 408 u16 pay_sum = 0; 409 410 spin_lock_irqsave(&dbf->san_lock, flags); 411 memset(rec, 0, sizeof(*rec)); 412 413 rec->id = id; 414 rec->fsf_req_id = req_id; 415 rec->d_id = d_id; 416 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 417 rec->pl_len = len; /* full length even if we cap pay below */ 418 if (!sg) 419 goto out; 420 rec_len = min_t(unsigned int, sg->length, ZFCP_DBF_SAN_MAX_PAYLOAD); 421 memcpy(rec->payload, sg_virt(sg), rec_len); /* part of 1st sg entry */ 422 if (len <= rec_len) 423 goto out; /* skip pay record if full content in rec->payload */ 424 425 /* if (len > rec_len): 426 * dump data up to cap_len ignoring small duplicate in rec->payload 427 */ 428 spin_lock(&dbf->pay_lock); 429 memset(payload, 0, sizeof(*payload)); 430 memcpy(payload->area, paytag, ZFCP_DBF_TAG_LEN); 431 payload->fsf_req_id = req_id; 432 payload->counter = 0; 433 for (; sg && pay_sum < cap_len; sg = sg_next(sg)) { 434 u16 pay_len, offset = 0; 435 436 while (offset < sg->length && pay_sum < cap_len) { 437 pay_len = min((u16)ZFCP_DBF_PAY_MAX_REC, 438 (u16)(sg->length - offset)); 439 /* cap_len <= pay_sum < cap_len+ZFCP_DBF_PAY_MAX_REC */ 440 memcpy(payload->data, sg_virt(sg) + offset, pay_len); 441 debug_event(dbf->pay, ZFCP_DBF_SAN_LEVEL, payload, 442 zfcp_dbf_plen(pay_len)); 443 payload->counter++; 444 offset += pay_len; 445 pay_sum += pay_len; 446 } 447 } 448 spin_unlock(&dbf->pay_lock); 449 450 out: 451 debug_event(dbf->san, ZFCP_DBF_SAN_LEVEL, rec, sizeof(*rec)); 452 spin_unlock_irqrestore(&dbf->san_lock, flags); 453 } 454 455 /** 456 * zfcp_dbf_san_req - trace event for issued SAN request 457 * @tag: identifier for event 458 * @fsf_req: request containing issued CT data 459 * d_id: destination ID 460 */ 461 void zfcp_dbf_san_req(char *tag, struct zfcp_fsf_req *fsf, u32 d_id) 462 { 463 struct zfcp_dbf *dbf = fsf->adapter->dbf; 464 struct zfcp_fsf_ct_els *ct_els = fsf->data; 465 u16 length; 466 467 if (unlikely(!debug_level_enabled(dbf->san, ZFCP_DBF_SAN_LEVEL))) 468 return; 469 470 length = (u16)zfcp_qdio_real_bytes(ct_els->req); 471 zfcp_dbf_san(tag, dbf, "san_req", ct_els->req, ZFCP_DBF_SAN_REQ, 472 length, fsf->req_id, d_id, length); 473 } 474 475 static u16 zfcp_dbf_san_res_cap_len_if_gpn_ft(char *tag, 476 struct zfcp_fsf_req *fsf, 477 u16 len) 478 { 479 struct zfcp_fsf_ct_els *ct_els = fsf->data; 480 struct fc_ct_hdr *reqh = sg_virt(ct_els->req); 481 struct fc_ns_gid_ft *reqn = (struct fc_ns_gid_ft *)(reqh + 1); 482 struct scatterlist *resp_entry = ct_els->resp; 483 struct fc_ct_hdr *resph; 484 struct fc_gpn_ft_resp *acc; 485 int max_entries, x, last = 0; 486 487 if (!(memcmp(tag, "fsscth2", 7) == 0 488 && ct_els->d_id == FC_FID_DIR_SERV 489 && reqh->ct_rev == FC_CT_REV 490 && reqh->ct_in_id[0] == 0 491 && reqh->ct_in_id[1] == 0 492 && reqh->ct_in_id[2] == 0 493 && reqh->ct_fs_type == FC_FST_DIR 494 && reqh->ct_fs_subtype == FC_NS_SUBTYPE 495 && reqh->ct_options == 0 496 && reqh->_ct_resvd1 == 0 497 && reqh->ct_cmd == cpu_to_be16(FC_NS_GPN_FT) 498 /* reqh->ct_mr_size can vary so do not match but read below */ 499 && reqh->_ct_resvd2 == 0 500 && reqh->ct_reason == 0 501 && reqh->ct_explan == 0 502 && reqh->ct_vendor == 0 503 && reqn->fn_resvd == 0 504 && reqn->fn_domain_id_scope == 0 505 && reqn->fn_area_id_scope == 0 506 && reqn->fn_fc4_type == FC_TYPE_FCP)) 507 return len; /* not GPN_FT response so do not cap */ 508 509 acc = sg_virt(resp_entry); 510 511 /* cap all but accept CT responses to at least the CT header */ 512 resph = (struct fc_ct_hdr *)acc; 513 if ((ct_els->status) || 514 (resph->ct_cmd != cpu_to_be16(FC_FS_ACC))) 515 return max(FC_CT_HDR_LEN, ZFCP_DBF_SAN_MAX_PAYLOAD); 516 517 max_entries = (be16_to_cpu(reqh->ct_mr_size) * 4 / 518 sizeof(struct fc_gpn_ft_resp)) 519 + 1 /* zfcp_fc_scan_ports: bytes correct, entries off-by-one 520 * to account for header as 1st pseudo "entry" */; 521 522 /* the basic CT_IU preamble is the same size as one entry in the GPN_FT 523 * response, allowing us to skip special handling for it - just skip it 524 */ 525 for (x = 1; x < max_entries && !last; x++) { 526 if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1)) 527 acc++; 528 else 529 acc = sg_virt(++resp_entry); 530 531 last = acc->fp_flags & FC_NS_FID_LAST; 532 } 533 len = min(len, (u16)(x * sizeof(struct fc_gpn_ft_resp))); 534 return len; /* cap after last entry */ 535 } 536 537 /** 538 * zfcp_dbf_san_res - trace event for received SAN request 539 * @tag: identifier for event 540 * @fsf_req: request containing issued CT data 541 */ 542 void zfcp_dbf_san_res(char *tag, struct zfcp_fsf_req *fsf) 543 { 544 struct zfcp_dbf *dbf = fsf->adapter->dbf; 545 struct zfcp_fsf_ct_els *ct_els = fsf->data; 546 u16 length; 547 548 if (unlikely(!debug_level_enabled(dbf->san, ZFCP_DBF_SAN_LEVEL))) 549 return; 550 551 length = (u16)zfcp_qdio_real_bytes(ct_els->resp); 552 zfcp_dbf_san(tag, dbf, "san_res", ct_els->resp, ZFCP_DBF_SAN_RES, 553 length, fsf->req_id, ct_els->d_id, 554 zfcp_dbf_san_res_cap_len_if_gpn_ft(tag, fsf, length)); 555 } 556 557 /** 558 * zfcp_dbf_san_in_els - trace event for incoming ELS 559 * @tag: identifier for event 560 * @fsf_req: request containing issued CT data 561 */ 562 void zfcp_dbf_san_in_els(char *tag, struct zfcp_fsf_req *fsf) 563 { 564 struct zfcp_dbf *dbf = fsf->adapter->dbf; 565 struct fsf_status_read_buffer *srb = 566 (struct fsf_status_read_buffer *) fsf->data; 567 u16 length; 568 struct scatterlist sg; 569 570 if (unlikely(!debug_level_enabled(dbf->san, ZFCP_DBF_SAN_LEVEL))) 571 return; 572 573 length = (u16)(srb->length - 574 offsetof(struct fsf_status_read_buffer, payload)); 575 sg_init_one(&sg, srb->payload.data, length); 576 zfcp_dbf_san(tag, dbf, "san_els", &sg, ZFCP_DBF_SAN_ELS, length, 577 fsf->req_id, ntoh24(srb->d_id), length); 578 } 579 580 /** 581 * zfcp_dbf_scsi - trace event for scsi commands 582 * @tag: identifier for event 583 * @sc: pointer to struct scsi_cmnd 584 * @fsf: pointer to struct zfcp_fsf_req 585 */ 586 void zfcp_dbf_scsi(char *tag, int level, struct scsi_cmnd *sc, 587 struct zfcp_fsf_req *fsf) 588 { 589 struct zfcp_adapter *adapter = 590 (struct zfcp_adapter *) sc->device->host->hostdata[0]; 591 struct zfcp_dbf *dbf = adapter->dbf; 592 struct zfcp_dbf_scsi *rec = &dbf->scsi_buf; 593 struct fcp_resp_with_ext *fcp_rsp; 594 struct fcp_resp_rsp_info *fcp_rsp_info; 595 unsigned long flags; 596 597 spin_lock_irqsave(&dbf->scsi_lock, flags); 598 memset(rec, 0, sizeof(*rec)); 599 600 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 601 rec->id = ZFCP_DBF_SCSI_CMND; 602 rec->scsi_result = sc->result; 603 rec->scsi_retries = sc->retries; 604 rec->scsi_allowed = sc->allowed; 605 rec->scsi_id = sc->device->id; 606 rec->scsi_lun = (u32)sc->device->lun; 607 rec->scsi_lun_64_hi = (u32)(sc->device->lun >> 32); 608 rec->host_scribble = (unsigned long)sc->host_scribble; 609 610 memcpy(rec->scsi_opcode, sc->cmnd, 611 min((int)sc->cmd_len, ZFCP_DBF_SCSI_OPCODE)); 612 613 if (fsf) { 614 rec->fsf_req_id = fsf->req_id; 615 rec->pl_len = FCP_RESP_WITH_EXT; 616 fcp_rsp = &(fsf->qtcb->bottom.io.fcp_rsp.iu); 617 /* mandatory parts of FCP_RSP IU in this SCSI record */ 618 memcpy(&rec->fcp_rsp, fcp_rsp, FCP_RESP_WITH_EXT); 619 if (fcp_rsp->resp.fr_flags & FCP_RSP_LEN_VAL) { 620 fcp_rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1]; 621 rec->fcp_rsp_info = fcp_rsp_info->rsp_code; 622 rec->pl_len += be32_to_cpu(fcp_rsp->ext.fr_rsp_len); 623 } 624 if (fcp_rsp->resp.fr_flags & FCP_SNS_LEN_VAL) { 625 rec->pl_len += be32_to_cpu(fcp_rsp->ext.fr_sns_len); 626 } 627 /* complete FCP_RSP IU in associated PAYload record 628 * but only if there are optional parts 629 */ 630 if (fcp_rsp->resp.fr_flags != 0) 631 zfcp_dbf_pl_write( 632 dbf, fcp_rsp, 633 /* at least one full PAY record 634 * but not beyond hardware response field 635 */ 636 min_t(u16, max_t(u16, rec->pl_len, 637 ZFCP_DBF_PAY_MAX_REC), 638 FSF_FCP_RSP_SIZE), 639 "fcp_riu", fsf->req_id); 640 } 641 642 debug_event(dbf->scsi, level, rec, sizeof(*rec)); 643 spin_unlock_irqrestore(&dbf->scsi_lock, flags); 644 } 645 646 static debug_info_t *zfcp_dbf_reg(const char *name, int size, int rec_size) 647 { 648 struct debug_info *d; 649 650 d = debug_register(name, size, 1, rec_size); 651 if (!d) 652 return NULL; 653 654 debug_register_view(d, &debug_hex_ascii_view); 655 debug_set_level(d, dbflevel); 656 657 return d; 658 } 659 660 static void zfcp_dbf_unregister(struct zfcp_dbf *dbf) 661 { 662 if (!dbf) 663 return; 664 665 debug_unregister(dbf->scsi); 666 debug_unregister(dbf->san); 667 debug_unregister(dbf->hba); 668 debug_unregister(dbf->pay); 669 debug_unregister(dbf->rec); 670 kfree(dbf); 671 } 672 673 /** 674 * zfcp_adapter_debug_register - registers debug feature for an adapter 675 * @adapter: pointer to adapter for which debug features should be registered 676 * return: -ENOMEM on error, 0 otherwise 677 */ 678 int zfcp_dbf_adapter_register(struct zfcp_adapter *adapter) 679 { 680 char name[DEBUG_MAX_NAME_LEN]; 681 struct zfcp_dbf *dbf; 682 683 dbf = kzalloc(sizeof(struct zfcp_dbf), GFP_KERNEL); 684 if (!dbf) 685 return -ENOMEM; 686 687 spin_lock_init(&dbf->pay_lock); 688 spin_lock_init(&dbf->hba_lock); 689 spin_lock_init(&dbf->san_lock); 690 spin_lock_init(&dbf->scsi_lock); 691 spin_lock_init(&dbf->rec_lock); 692 693 /* debug feature area which records recovery activity */ 694 sprintf(name, "zfcp_%s_rec", dev_name(&adapter->ccw_device->dev)); 695 dbf->rec = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_rec)); 696 if (!dbf->rec) 697 goto err_out; 698 699 /* debug feature area which records HBA (FSF and QDIO) conditions */ 700 sprintf(name, "zfcp_%s_hba", dev_name(&adapter->ccw_device->dev)); 701 dbf->hba = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_hba)); 702 if (!dbf->hba) 703 goto err_out; 704 705 /* debug feature area which records payload info */ 706 sprintf(name, "zfcp_%s_pay", dev_name(&adapter->ccw_device->dev)); 707 dbf->pay = zfcp_dbf_reg(name, dbfsize * 2, sizeof(struct zfcp_dbf_pay)); 708 if (!dbf->pay) 709 goto err_out; 710 711 /* debug feature area which records SAN command failures and recovery */ 712 sprintf(name, "zfcp_%s_san", dev_name(&adapter->ccw_device->dev)); 713 dbf->san = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_san)); 714 if (!dbf->san) 715 goto err_out; 716 717 /* debug feature area which records SCSI command failures and recovery */ 718 sprintf(name, "zfcp_%s_scsi", dev_name(&adapter->ccw_device->dev)); 719 dbf->scsi = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_scsi)); 720 if (!dbf->scsi) 721 goto err_out; 722 723 adapter->dbf = dbf; 724 725 return 0; 726 err_out: 727 zfcp_dbf_unregister(dbf); 728 return -ENOMEM; 729 } 730 731 /** 732 * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter 733 * @adapter: pointer to adapter for which debug features should be unregistered 734 */ 735 void zfcp_dbf_adapter_unregister(struct zfcp_adapter *adapter) 736 { 737 struct zfcp_dbf *dbf = adapter->dbf; 738 739 adapter->dbf = NULL; 740 zfcp_dbf_unregister(dbf); 741 } 742 743