drivers/scsi/bfa/bfa_tskim.c

   1 /*
   2  * Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
   3  * All rights reserved
   4  * www.brocade.com
   5  *
   6  * Linux driver for Brocade Fibre Channel Host Bus Adapter.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License (GPL) Version 2 as
  10  * published by the Free Software Foundation
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  */
  17
  18 #include <bfa.h>
  19 #include <bfa_cb_ioim_macros.h>
  20
  21 BFA_TRC_FILE(HAL, TSKIM);
  22
  23 /**
  24  * task management completion handling
  25  */
  26 #define bfa_tskim_qcomp(__tskim, __cbfn) do {                        \
  27         bfa_cb_queue((__tskim)->bfa, &(__tskim)->hcb_qe, __cbfn, (__tskim)); \
  28         bfa_tskim_notify_comp(__tskim);      \
  29 } while (0)
  30
  31 #define bfa_tskim_notify_comp(__tskim) do {                                  \
  32         if ((__tskim)->notify)                                               \
  33                 bfa_itnim_tskdone((__tskim)->itnim);      \
  34 } while (0)
  35
  36 /*
  37  * forward declarations
  38  */
  39 static void     __bfa_cb_tskim_done(void *cbarg, bfa_boolean_t complete);
  40 static void     __bfa_cb_tskim_failed(void *cbarg, bfa_boolean_t complete);
  41 static bfa_boolean_t bfa_tskim_match_scope(struct bfa_tskim_s *tskim,
  42                                                lun_t lun);
  43 static void     bfa_tskim_gather_ios(struct bfa_tskim_s *tskim);
  44 static void     bfa_tskim_cleanp_comp(void *tskim_cbarg);
  45 static void     bfa_tskim_cleanup_ios(struct bfa_tskim_s *tskim);
  46 static bfa_boolean_t bfa_tskim_send(struct bfa_tskim_s *tskim);
  47 static bfa_boolean_t bfa_tskim_send_abort(struct bfa_tskim_s *tskim);
  48 static void     bfa_tskim_iocdisable_ios(struct bfa_tskim_s *tskim);
  49
  50 /**
  51  *  bfa_tskim_sm
  52  */
  53
  54 enum bfa_tskim_event {
  55         BFA_TSKIM_SM_START        = 1,  /*  TM command start            */
  56         BFA_TSKIM_SM_DONE         = 2,  /*  TM completion               */
  57         BFA_TSKIM_SM_QRESUME      = 3,  /*  resume after qfull          */
  58         BFA_TSKIM_SM_HWFAIL       = 5,  /*  IOC h/w failure event       */
  59         BFA_TSKIM_SM_HCB          = 6,  /*  BFA callback completion     */
  60         BFA_TSKIM_SM_IOS_DONE     = 7,  /*  IO and sub TM completions   */
  61         BFA_TSKIM_SM_CLEANUP      = 8,  /*  TM cleanup on ITN offline   */
  62         BFA_TSKIM_SM_CLEANUP_DONE = 9,  /*  TM abort completion         */
  63 };
  64
  65 static void     bfa_tskim_sm_uninit(struct bfa_tskim_s *tskim,
  66                                         enum bfa_tskim_event event);
  67 static void     bfa_tskim_sm_active(struct bfa_tskim_s *tskim,
  68                                         enum bfa_tskim_event event);
  69 static void     bfa_tskim_sm_cleanup(struct bfa_tskim_s *tskim,
  70                                          enum bfa_tskim_event event);
  71 static void     bfa_tskim_sm_iocleanup(struct bfa_tskim_s *tskim,
  72                                          enum bfa_tskim_event event);
  73 static void     bfa_tskim_sm_qfull(struct bfa_tskim_s *tskim,
  74                                        enum bfa_tskim_event event);
  75 static void     bfa_tskim_sm_cleanup_qfull(struct bfa_tskim_s *tskim,
  76                                        enum bfa_tskim_event event);
  77 static void     bfa_tskim_sm_hcb(struct bfa_tskim_s *tskim,
  78                                      enum bfa_tskim_event event);
  79
  80 /**
  81  *      Task management command beginning state.
  82  */
  83 static void
  84 bfa_tskim_sm_uninit(struct bfa_tskim_s *tskim, enum bfa_tskim_event event)
  85 {
  86         bfa_trc(tskim->bfa, event);
  87
  88         switch (event) {
  89         case BFA_TSKIM_SM_START:
  90                 bfa_sm_set_state(tskim, bfa_tskim_sm_active);
  91                 bfa_tskim_gather_ios(tskim);
  92
  93                 /**
  94                  * If device is offline, do not send TM on wire. Just cleanup
  95                  * any pending IO requests and complete TM request.
  96                  */
  97                 if (!bfa_itnim_is_online(tskim->itnim)) {
  98                         bfa_sm_set_state(tskim, bfa_tskim_sm_iocleanup);
  99                         tskim->tsk_status = BFI_TSKIM_STS_OK;
 100                         bfa_tskim_cleanup_ios(tskim);
 101                         return;
 102                 }
 103
 104                 if (!bfa_tskim_send(tskim)) {
 105                         bfa_sm_set_state(tskim, bfa_tskim_sm_qfull);
 106                         bfa_reqq_wait(tskim->bfa, tskim->itnim->reqq,
 107                                           &tskim->reqq_wait);
 108                 }
 109                 break;
 110
 111         default:
 112                 bfa_assert(0);
 113         }
 114 }
 115
 116 /**
 117  * brief
 118  *      TM command is active, awaiting completion from firmware to
 119  *      cleanup IO requests in TM scope.
 120  */
 121 static void
 122 bfa_tskim_sm_active(struct bfa_tskim_s *tskim, enum bfa_tskim_event event)
 123 {
 124         bfa_trc(tskim->bfa, event);
 125
 126         switch (event) {
 127         case BFA_TSKIM_SM_DONE:
 128                 bfa_sm_set_state(tskim, bfa_tskim_sm_iocleanup);
 129                 bfa_tskim_cleanup_ios(tskim);
 130                 break;
 131
 132         case BFA_TSKIM_SM_CLEANUP:
 133                 bfa_sm_set_state(tskim, bfa_tskim_sm_cleanup);
 134                 if (!bfa_tskim_send_abort(tskim)) {
 135                         bfa_sm_set_state(tskim, bfa_tskim_sm_cleanup_qfull);
 136                         bfa_reqq_wait(tskim->bfa, tskim->itnim->reqq,
 137                                 &tskim->reqq_wait);
 138                 }
 139                 break;
 140
 141         case BFA_TSKIM_SM_HWFAIL:
 142                 bfa_sm_set_state(tskim, bfa_tskim_sm_hcb);
 143                 bfa_tskim_iocdisable_ios(tskim);
 144                 bfa_tskim_qcomp(tskim, __bfa_cb_tskim_failed);
 145                 break;
 146
 147         default:
 148                 bfa_assert(0);
 149         }
 150 }
 151
 152 /**
 153  *      An active TM is being cleaned up since ITN is offline. Awaiting cleanup
 154  *      completion event from firmware.
 155  */
 156 static void
 157 bfa_tskim_sm_cleanup(struct bfa_tskim_s *tskim, enum bfa_tskim_event event)
 158 {
 159         bfa_trc(tskim->bfa, event);
 160
 161         switch (event) {
 162         case BFA_TSKIM_SM_DONE:
 163                 /**
 164                  * Ignore and wait for ABORT completion from firmware.
 165                  */
 166                 break;
 167
 168         case BFA_TSKIM_SM_CLEANUP_DONE:
 169                 bfa_sm_set_state(tskim, bfa_tskim_sm_iocleanup);
 170                 bfa_tskim_cleanup_ios(tskim);
 171                 break;
 172
 173         case BFA_TSKIM_SM_HWFAIL:
 174                 bfa_sm_set_state(tskim, bfa_tskim_sm_hcb);
 175                 bfa_tskim_iocdisable_ios(tskim);
 176                 bfa_tskim_qcomp(tskim, __bfa_cb_tskim_failed);
 177                 break;
 178
 179         default:
 180                 bfa_assert(0);
 181         }
 182 }
 183
 184 static void
 185 bfa_tskim_sm_iocleanup(struct bfa_tskim_s *tskim, enum bfa_tskim_event event)
 186 {
 187         bfa_trc(tskim->bfa, event);
 188
 189         switch (event) {
 190         case BFA_TSKIM_SM_IOS_DONE:
 191                 bfa_sm_set_state(tskim, bfa_tskim_sm_hcb);
 192                 bfa_tskim_qcomp(tskim, __bfa_cb_tskim_done);
 193                 break;
 194
 195         case BFA_TSKIM_SM_CLEANUP:
 196                 /**
 197                  * Ignore, TM command completed on wire.
 198                  * Notify TM conmpletion on IO cleanup completion.
 199                  */
 200                 break;
 201
 202         case BFA_TSKIM_SM_HWFAIL:
 203                 bfa_sm_set_state(tskim, bfa_tskim_sm_hcb);
 204                 bfa_tskim_iocdisable_ios(tskim);
 205                 bfa_tskim_qcomp(tskim, __bfa_cb_tskim_failed);
 206                 break;
 207
 208         default:
 209                 bfa_assert(0);
 210         }
 211 }
 212
 213 /**
 214  *      Task management command is waiting for room in request CQ
 215  */
 216 static void
 217 bfa_tskim_sm_qfull(struct bfa_tskim_s *tskim, enum bfa_tskim_event event)
 218 {
 219         bfa_trc(tskim->bfa, event);
 220
 221         switch (event) {
 222         case BFA_TSKIM_SM_QRESUME:
 223                 bfa_sm_set_state(tskim, bfa_tskim_sm_active);
 224                 bfa_tskim_send(tskim);
 225                 break;
 226
 227         case BFA_TSKIM_SM_CLEANUP:
 228                 /**
 229                  * No need to send TM on wire since ITN is offline.
 230                  */
 231                 bfa_sm_set_state(tskim, bfa_tskim_sm_iocleanup);
 232                 bfa_reqq_wcancel(&tskim->reqq_wait);
 233                 bfa_tskim_cleanup_ios(tskim);
 234                 break;
 235
 236         case BFA_TSKIM_SM_HWFAIL:
 237                 bfa_sm_set_state(tskim, bfa_tskim_sm_hcb);
 238                 bfa_reqq_wcancel(&tskim->reqq_wait);
 239                 bfa_tskim_iocdisable_ios(tskim);
 240                 bfa_tskim_qcomp(tskim, __bfa_cb_tskim_failed);
 241                 break;
 242
 243         default:
 244                 bfa_assert(0);
 245         }
 246 }
 247
 248 /**
 249  *      Task management command is active, awaiting for room in request CQ
 250  *      to send clean up request.
 251  */
 252 static void
 253 bfa_tskim_sm_cleanup_qfull(struct bfa_tskim_s *tskim,
 254                 enum bfa_tskim_event event)
 255 {
 256         bfa_trc(tskim->bfa, event);
 257
 258         switch (event) {
 259         case BFA_TSKIM_SM_DONE:
 260                 bfa_reqq_wcancel(&tskim->reqq_wait);
 261                 /**
 262                  *
 263                  * Fall through !!!
 264                  */
 265
 266         case BFA_TSKIM_SM_QRESUME:
 267                 bfa_sm_set_state(tskim, bfa_tskim_sm_cleanup);
 268                 bfa_tskim_send_abort(tskim);
 269                 break;
 270
 271         case BFA_TSKIM_SM_HWFAIL:
 272                 bfa_sm_set_state(tskim, bfa_tskim_sm_hcb);
 273                 bfa_reqq_wcancel(&tskim->reqq_wait);
 274                 bfa_tskim_iocdisable_ios(tskim);
 275                 bfa_tskim_qcomp(tskim, __bfa_cb_tskim_failed);
 276                 break;
 277
 278         default:
 279                 bfa_assert(0);
 280         }
 281 }
 282
 283 /**
 284  *      BFA callback is pending
 285  */
 286 static void
 287 bfa_tskim_sm_hcb(struct bfa_tskim_s *tskim, enum bfa_tskim_event event)
 288 {
 289         bfa_trc(tskim->bfa, event);
 290
 291         switch (event) {
 292         case BFA_TSKIM_SM_HCB:
 293                 bfa_sm_set_state(tskim, bfa_tskim_sm_uninit);
 294                 bfa_tskim_free(tskim);
 295                 break;
 296
 297         case BFA_TSKIM_SM_CLEANUP:
 298                 bfa_tskim_notify_comp(tskim);
 299                 break;
 300
 301         case BFA_TSKIM_SM_HWFAIL:
 302                 break;
 303
 304         default:
 305                 bfa_assert(0);
 306         }
 307 }
 308
 309
 310
 311 /**
 312  *  bfa_tskim_private
 313  */
 314
 315 static void
 316 __bfa_cb_tskim_done(void *cbarg, bfa_boolean_t complete)
 317 {
 318         struct bfa_tskim_s *tskim = cbarg;
 319
 320         if (!complete) {
 321                 bfa_sm_send_event(tskim, BFA_TSKIM_SM_HCB);
 322                 return;
 323         }
 324
 325         bfa_stats(tskim->itnim, tm_success);
 326         bfa_cb_tskim_done(tskim->bfa->bfad, tskim->dtsk, tskim->tsk_status);
 327 }
 328
 329 static void
 330 __bfa_cb_tskim_failed(void *cbarg, bfa_boolean_t complete)
 331 {
 332         struct bfa_tskim_s *tskim = cbarg;
 333
 334         if (!complete) {
 335                 bfa_sm_send_event(tskim, BFA_TSKIM_SM_HCB);
 336                 return;
 337         }
 338
 339         bfa_stats(tskim->itnim, tm_failures);
 340         bfa_cb_tskim_done(tskim->bfa->bfad, tskim->dtsk,
 341                            BFI_TSKIM_STS_FAILED);
 342 }
 343
 344 static          bfa_boolean_t
 345 bfa_tskim_match_scope(struct bfa_tskim_s *tskim, lun_t lun)
 346 {
 347         switch (tskim->tm_cmnd) {
 348         case FCP_TM_TARGET_RESET:
 349                 return BFA_TRUE;
 350
 351         case FCP_TM_ABORT_TASK_SET:
 352         case FCP_TM_CLEAR_TASK_SET:
 353         case FCP_TM_LUN_RESET:
 354         case FCP_TM_CLEAR_ACA:
 355                 return (tskim->lun == lun);
 356
 357         default:
 358                 bfa_assert(0);
 359         }
 360
 361         return BFA_FALSE;
 362 }
 363
 364 /**
 365  *      Gather affected IO requests and task management commands.
 366  */
 367 static void
 368 bfa_tskim_gather_ios(struct bfa_tskim_s *tskim)
 369 {
 370         struct bfa_itnim_s *itnim = tskim->itnim;
 371         struct bfa_ioim_s *ioim;
 372         struct list_head        *qe, *qen;
 373
 374         INIT_LIST_HEAD(&tskim->io_q);
 375
 376         /**
 377          * Gather any active IO requests first.
 378          */
 379         list_for_each_safe(qe, qen, &itnim->io_q) {
 380                 ioim = (struct bfa_ioim_s *) qe;
 381                 if (bfa_tskim_match_scope
 382                     (tskim, bfa_cb_ioim_get_lun(ioim->dio))) {
 383                         list_del(&ioim->qe);
 384                         list_add_tail(&ioim->qe, &tskim->io_q);
 385                 }
 386         }
 387
 388         /**
 389          * Failback any pending IO requests immediately.
 390          */
 391         list_for_each_safe(qe, qen, &itnim->pending_q) {
 392                 ioim = (struct bfa_ioim_s *) qe;
 393                 if (bfa_tskim_match_scope
 394                     (tskim, bfa_cb_ioim_get_lun(ioim->dio))) {
 395                         list_del(&ioim->qe);
 396                         list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
 397                         bfa_ioim_tov(ioim);
 398                 }
 399         }
 400 }
 401
 402 /**
 403  *              IO cleanup completion
 404  */
 405 static void
 406 bfa_tskim_cleanp_comp(void *tskim_cbarg)
 407 {
 408         struct bfa_tskim_s *tskim = tskim_cbarg;
 409
 410         bfa_stats(tskim->itnim, tm_io_comps);
 411         bfa_sm_send_event(tskim, BFA_TSKIM_SM_IOS_DONE);
 412 }
 413
 414 /**
 415  *      Gather affected IO requests and task management commands.
 416  */
 417 static void
 418 bfa_tskim_cleanup_ios(struct bfa_tskim_s *tskim)
 419 {
 420         struct bfa_ioim_s *ioim;
 421         struct list_head        *qe, *qen;
 422
 423         bfa_wc_init(&tskim->wc, bfa_tskim_cleanp_comp, tskim);
 424
 425         list_for_each_safe(qe, qen, &tskim->io_q) {
 426                 ioim = (struct bfa_ioim_s *) qe;
 427                 bfa_wc_up(&tskim->wc);
 428                 bfa_ioim_cleanup_tm(ioim, tskim);
 429         }
 430
 431         bfa_wc_wait(&tskim->wc);
 432 }
 433
 434 /**
 435  *      Send task management request to firmware.
 436  */
 437 static bfa_boolean_t
 438 bfa_tskim_send(struct bfa_tskim_s *tskim)
 439 {
 440         struct bfa_itnim_s *itnim = tskim->itnim;
 441         struct bfi_tskim_req_s *m;
 442
 443         /**
 444          * check for room in queue to send request now
 445          */
 446         m = bfa_reqq_next(tskim->bfa, itnim->reqq);
 447         if (!m)
 448                 return BFA_FALSE;
 449
 450         /**
 451          * build i/o request message next
 452          */
 453         bfi_h2i_set(m->mh, BFI_MC_TSKIM, BFI_TSKIM_H2I_TM_REQ,
 454                         bfa_lpuid(tskim->bfa));
 455
 456         m->tsk_tag = bfa_os_htons(tskim->tsk_tag);
 457         m->itn_fhdl = tskim->itnim->rport->fw_handle;
 458         m->t_secs = tskim->tsecs;
 459         m->lun = tskim->lun;
 460         m->tm_flags = tskim->tm_cmnd;
 461
 462         /**
 463          * queue I/O message to firmware
 464          */
 465         bfa_reqq_produce(tskim->bfa, itnim->reqq);
 466         return BFA_TRUE;
 467 }
 468
 469 /**
 470  *      Send abort request to cleanup an active TM to firmware.
 471  */
 472 static bfa_boolean_t
 473 bfa_tskim_send_abort(struct bfa_tskim_s *tskim)
 474 {
 475         struct bfa_itnim_s             *itnim = tskim->itnim;
 476         struct bfi_tskim_abortreq_s    *m;
 477
 478         /**
 479          * check for room in queue to send request now
 480          */
 481         m = bfa_reqq_next(tskim->bfa, itnim->reqq);
 482         if (!m)
 483                 return BFA_FALSE;
 484
 485         /**
 486          * build i/o request message next
 487          */
 488         bfi_h2i_set(m->mh, BFI_MC_TSKIM, BFI_TSKIM_H2I_ABORT_REQ,
 489                         bfa_lpuid(tskim->bfa));
 490
 491         m->tsk_tag  = bfa_os_htons(tskim->tsk_tag);
 492
 493         /**
 494          * queue I/O message to firmware
 495          */
 496         bfa_reqq_produce(tskim->bfa, itnim->reqq);
 497         return BFA_TRUE;
 498 }
 499
 500 /**
 501  *      Call to resume task management cmnd waiting for room in request queue.
 502  */
 503 static void
 504 bfa_tskim_qresume(void *cbarg)
 505 {
 506         struct bfa_tskim_s *tskim = cbarg;
 507
 508         bfa_fcpim_stats(tskim->fcpim, qresumes);
 509         bfa_stats(tskim->itnim, tm_qresumes);
 510         bfa_sm_send_event(tskim, BFA_TSKIM_SM_QRESUME);
 511 }
 512
 513 /**
 514  * Cleanup IOs associated with a task mangement command on IOC failures.
 515  */
 516 static void
 517 bfa_tskim_iocdisable_ios(struct bfa_tskim_s *tskim)
 518 {
 519         struct bfa_ioim_s *ioim;
 520         struct list_head        *qe, *qen;
 521
 522         list_for_each_safe(qe, qen, &tskim->io_q) {
 523                 ioim = (struct bfa_ioim_s *) qe;
 524                 bfa_ioim_iocdisable(ioim);
 525         }
 526 }
 527
 528
 529
 530 /**
 531  *  bfa_tskim_friend
 532  */
 533
 534 /**
 535  * Notification on completions from related ioim.
 536  */
 537 void
 538 bfa_tskim_iodone(struct bfa_tskim_s *tskim)
 539 {
 540         bfa_wc_down(&tskim->wc);
 541 }
 542
 543 /**
 544  * Handle IOC h/w failure notification from itnim.
 545  */
 546 void
 547 bfa_tskim_iocdisable(struct bfa_tskim_s *tskim)
 548 {
 549         tskim->notify = BFA_FALSE;
 550         bfa_stats(tskim->itnim, tm_iocdowns);
 551         bfa_sm_send_event(tskim, BFA_TSKIM_SM_HWFAIL);
 552 }
 553
 554 /**
 555  * Cleanup TM command and associated IOs as part of ITNIM offline.
 556  */
 557 void
 558 bfa_tskim_cleanup(struct bfa_tskim_s *tskim)
 559 {
 560         tskim->notify = BFA_TRUE;
 561         bfa_stats(tskim->itnim, tm_cleanups);
 562         bfa_sm_send_event(tskim, BFA_TSKIM_SM_CLEANUP);
 563 }
 564
 565 /**
 566  *      Memory allocation and initialization.
 567  */
 568 void
 569 bfa_tskim_attach(struct bfa_fcpim_mod_s *fcpim, struct bfa_meminfo_s *minfo)
 570 {
 571         struct bfa_tskim_s *tskim;
 572         u16        i;
 573
 574         INIT_LIST_HEAD(&fcpim->tskim_free_q);
 575
 576         tskim = (struct bfa_tskim_s *) bfa_meminfo_kva(minfo);
 577         fcpim->tskim_arr = tskim;
 578
 579         for (i = 0; i < fcpim->num_tskim_reqs; i++, tskim++) {
 580                 /*
 581                  * initialize TSKIM
 582                  */
 583                 bfa_os_memset(tskim, 0, sizeof(struct bfa_tskim_s));
 584                 tskim->tsk_tag = i;
 585                 tskim->bfa     = fcpim->bfa;
 586                 tskim->fcpim   = fcpim;
 587                 tskim->notify  = BFA_FALSE;
 588                 bfa_reqq_winit(&tskim->reqq_wait, bfa_tskim_qresume,
 589                                    tskim);
 590                 bfa_sm_set_state(tskim, bfa_tskim_sm_uninit);
 591
 592                 list_add_tail(&tskim->qe, &fcpim->tskim_free_q);
 593         }
 594
 595         bfa_meminfo_kva(minfo) = (u8 *) tskim;
 596 }
 597
 598 void
 599 bfa_tskim_detach(struct bfa_fcpim_mod_s *fcpim)
 600 {
 601     /**
 602      * @todo
 603      */
 604 }
 605
 606 void
 607 bfa_tskim_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
 608 {
 609         struct bfa_fcpim_mod_s *fcpim = BFA_FCPIM_MOD(bfa);
 610         struct bfi_tskim_rsp_s *rsp = (struct bfi_tskim_rsp_s *) m;
 611         struct bfa_tskim_s *tskim;
 612         u16        tsk_tag = bfa_os_ntohs(rsp->tsk_tag);
 613
 614         tskim = BFA_TSKIM_FROM_TAG(fcpim, tsk_tag);
 615         bfa_assert(tskim->tsk_tag == tsk_tag);
 616
 617         tskim->tsk_status = rsp->tsk_status;
 618
 619         /**
 620          * Firmware sends BFI_TSKIM_STS_ABORTED status for abort
 621          * requests. All other statuses are for normal completions.
 622          */
 623         if (rsp->tsk_status == BFI_TSKIM_STS_ABORTED) {
 624                 bfa_stats(tskim->itnim, tm_cleanup_comps);
 625                 bfa_sm_send_event(tskim, BFA_TSKIM_SM_CLEANUP_DONE);
 626         } else {
 627                 bfa_stats(tskim->itnim, tm_fw_rsps);
 628                 bfa_sm_send_event(tskim, BFA_TSKIM_SM_DONE);
 629         }
 630 }
 631
 632
 633
 634 /**
 635  *  bfa_tskim_api
 636  */
 637
 638
 639 struct bfa_tskim_s *
 640 bfa_tskim_alloc(struct bfa_s *bfa, struct bfad_tskim_s *dtsk)
 641 {
 642         struct bfa_fcpim_mod_s *fcpim = BFA_FCPIM_MOD(bfa);
 643         struct bfa_tskim_s *tskim;
 644
 645         bfa_q_deq(&fcpim->tskim_free_q, &tskim);
 646
 647         if (!tskim)
 648                 bfa_fcpim_stats(fcpim, no_tskims);
 649         else
 650                 tskim->dtsk = dtsk;
 651
 652         return tskim;
 653 }
 654
 655 void
 656 bfa_tskim_free(struct bfa_tskim_s *tskim)
 657 {
 658         bfa_assert(bfa_q_is_on_q_func(&tskim->itnim->tsk_q, &tskim->qe));
 659         list_del(&tskim->qe);
 660         list_add_tail(&tskim->qe, &tskim->fcpim->tskim_free_q);
 661 }
 662
 663 /**
 664  *      Start a task management command.
 665  *
 666  * @param[in]       tskim       BFA task management command instance
 667  * @param[in]       itnim       i-t nexus for the task management command
 668  * @param[in]       lun         lun, if applicable
 669  * @param[in]       tm_cmnd     Task management command code.
 670  * @param[in]       t_secs      Timeout in seconds
 671  *
 672  * @return None.
 673  */
 674 void
 675 bfa_tskim_start(struct bfa_tskim_s *tskim, struct bfa_itnim_s *itnim, lun_t lun,
 676                     enum fcp_tm_cmnd tm_cmnd, u8 tsecs)
 677 {
 678         tskim->itnim   = itnim;
 679         tskim->lun     = lun;
 680         tskim->tm_cmnd = tm_cmnd;
 681         tskim->tsecs   = tsecs;
 682         tskim->notify  = BFA_FALSE;
 683         bfa_stats(itnim, tm_cmnds);
 684
 685         list_add_tail(&tskim->qe, &itnim->tsk_q);
 686         bfa_sm_send_event(tskim, BFA_TSKIM_SM_START);
 687 }
 688
 689