drivers/scsi/bfa/bfa_fcs_fcpim.c

   1 /*
   2  * Copyright (c) 2005-2010 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 /*
  19  *  fcpim.c - FCP initiator mode i-t nexus state machine
  20  */
  21
  22 #include "bfad_drv.h"
  23 #include "bfa_fcs.h"
  24 #include "bfa_fcbuild.h"
  25 #include "bfad_im.h"
  26
  27 BFA_TRC_FILE(FCS, FCPIM);
  28
  29 /*
  30  * forward declarations
  31  */
  32 static void     bfa_fcs_itnim_timeout(void *arg);
  33 static void     bfa_fcs_itnim_free(struct bfa_fcs_itnim_s *itnim);
  34 static void     bfa_fcs_itnim_send_prli(void *itnim_cbarg,
  35                                         struct bfa_fcxp_s *fcxp_alloced);
  36 static void     bfa_fcs_itnim_prli_response(void *fcsarg,
  37                          struct bfa_fcxp_s *fcxp, void *cbarg,
  38                             bfa_status_t req_status, u32 rsp_len,
  39                             u32 resid_len, struct fchs_s *rsp_fchs);
  40
  41 /*
  42  *  fcs_itnim_sm FCS itnim state machine events
  43  */
  44
  45 enum bfa_fcs_itnim_event {
  46         BFA_FCS_ITNIM_SM_ONLINE = 1,    /*  rport online event */
  47         BFA_FCS_ITNIM_SM_OFFLINE = 2,   /*  rport offline */
  48         BFA_FCS_ITNIM_SM_FRMSENT = 3,   /*  prli frame is sent */
  49         BFA_FCS_ITNIM_SM_RSP_OK = 4,    /*  good response */
  50         BFA_FCS_ITNIM_SM_RSP_ERROR = 5, /*  error response */
  51         BFA_FCS_ITNIM_SM_TIMEOUT = 6,   /*  delay timeout */
  52         BFA_FCS_ITNIM_SM_HCB_OFFLINE = 7, /*  BFA online callback */
  53         BFA_FCS_ITNIM_SM_HCB_ONLINE = 8, /*  BFA offline callback */
  54         BFA_FCS_ITNIM_SM_INITIATOR = 9, /*  rport is initiator */
  55         BFA_FCS_ITNIM_SM_DELETE = 10,   /*  delete event from rport */
  56         BFA_FCS_ITNIM_SM_PRLO = 11,     /*  delete event from rport */
  57 };
  58
  59 static void     bfa_fcs_itnim_sm_offline(struct bfa_fcs_itnim_s *itnim,
  60                                          enum bfa_fcs_itnim_event event);
  61 static void     bfa_fcs_itnim_sm_prli_send(struct bfa_fcs_itnim_s *itnim,
  62                                            enum bfa_fcs_itnim_event event);
  63 static void     bfa_fcs_itnim_sm_prli(struct bfa_fcs_itnim_s *itnim,
  64                                       enum bfa_fcs_itnim_event event);
  65 static void     bfa_fcs_itnim_sm_prli_retry(struct bfa_fcs_itnim_s *itnim,
  66                                             enum bfa_fcs_itnim_event event);
  67 static void     bfa_fcs_itnim_sm_hcb_online(struct bfa_fcs_itnim_s *itnim,
  68                                             enum bfa_fcs_itnim_event event);
  69 static void     bfa_fcs_itnim_sm_online(struct bfa_fcs_itnim_s *itnim,
  70                                         enum bfa_fcs_itnim_event event);
  71 static void     bfa_fcs_itnim_sm_hcb_offline(struct bfa_fcs_itnim_s *itnim,
  72                                              enum bfa_fcs_itnim_event event);
  73 static void     bfa_fcs_itnim_sm_initiator(struct bfa_fcs_itnim_s *itnim,
  74                                            enum bfa_fcs_itnim_event event);
  75
  76 static struct bfa_sm_table_s itnim_sm_table[] = {
  77         {BFA_SM(bfa_fcs_itnim_sm_offline), BFA_ITNIM_OFFLINE},
  78         {BFA_SM(bfa_fcs_itnim_sm_prli_send), BFA_ITNIM_PRLI_SEND},
  79         {BFA_SM(bfa_fcs_itnim_sm_prli), BFA_ITNIM_PRLI_SENT},
  80         {BFA_SM(bfa_fcs_itnim_sm_prli_retry), BFA_ITNIM_PRLI_RETRY},
  81         {BFA_SM(bfa_fcs_itnim_sm_hcb_online), BFA_ITNIM_HCB_ONLINE},
  82         {BFA_SM(bfa_fcs_itnim_sm_online), BFA_ITNIM_ONLINE},
  83         {BFA_SM(bfa_fcs_itnim_sm_hcb_offline), BFA_ITNIM_HCB_OFFLINE},
  84         {BFA_SM(bfa_fcs_itnim_sm_initiator), BFA_ITNIM_INITIATIOR},
  85 };
  86
  87 /*
  88  *  fcs_itnim_sm FCS itnim state machine
  89  */
  90
  91 static void
  92 bfa_fcs_itnim_sm_offline(struct bfa_fcs_itnim_s *itnim,
  93                  enum bfa_fcs_itnim_event event)
  94 {
  95         bfa_trc(itnim->fcs, itnim->rport->pwwn);
  96         bfa_trc(itnim->fcs, event);
  97
  98         switch (event) {
  99         case BFA_FCS_ITNIM_SM_ONLINE:
 100                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_prli_send);
 101                 itnim->prli_retries = 0;
 102                 bfa_fcs_itnim_send_prli(itnim, NULL);
 103                 break;
 104
 105         case BFA_FCS_ITNIM_SM_OFFLINE:
 106                 bfa_sm_send_event(itnim->rport, RPSM_EVENT_FC4_OFFLINE);
 107                 break;
 108
 109         case BFA_FCS_ITNIM_SM_INITIATOR:
 110                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_initiator);
 111                 break;
 112
 113         case BFA_FCS_ITNIM_SM_DELETE:
 114                 bfa_fcs_itnim_free(itnim);
 115                 break;
 116
 117         default:
 118                 bfa_sm_fault(itnim->fcs, event);
 119         }
 120
 121 }
 122
 123 static void
 124 bfa_fcs_itnim_sm_prli_send(struct bfa_fcs_itnim_s *itnim,
 125                  enum bfa_fcs_itnim_event event)
 126 {
 127         bfa_trc(itnim->fcs, itnim->rport->pwwn);
 128         bfa_trc(itnim->fcs, event);
 129
 130         switch (event) {
 131         case BFA_FCS_ITNIM_SM_FRMSENT:
 132                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_prli);
 133                 break;
 134
 135         case BFA_FCS_ITNIM_SM_INITIATOR:
 136                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_initiator);
 137                 bfa_fcxp_walloc_cancel(itnim->fcs->bfa, &itnim->fcxp_wqe);
 138                 break;
 139
 140         case BFA_FCS_ITNIM_SM_OFFLINE:
 141                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
 142                 bfa_fcxp_walloc_cancel(itnim->fcs->bfa, &itnim->fcxp_wqe);
 143                 bfa_sm_send_event(itnim->rport, RPSM_EVENT_FC4_OFFLINE);
 144                 break;
 145
 146         case BFA_FCS_ITNIM_SM_DELETE:
 147                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
 148                 bfa_fcxp_walloc_cancel(itnim->fcs->bfa, &itnim->fcxp_wqe);
 149                 bfa_fcs_itnim_free(itnim);
 150                 break;
 151
 152         default:
 153                 bfa_sm_fault(itnim->fcs, event);
 154         }
 155 }
 156
 157 static void
 158 bfa_fcs_itnim_sm_prli(struct bfa_fcs_itnim_s *itnim,
 159                  enum bfa_fcs_itnim_event event)
 160 {
 161         bfa_trc(itnim->fcs, itnim->rport->pwwn);
 162         bfa_trc(itnim->fcs, event);
 163
 164         switch (event) {
 165         case BFA_FCS_ITNIM_SM_RSP_OK:
 166                 if (itnim->rport->scsi_function == BFA_RPORT_INITIATOR) {
 167                         bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_initiator);
 168                 } else {
 169                         bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_hcb_online);
 170                         bfa_itnim_online(itnim->bfa_itnim, itnim->seq_rec);
 171                 }
 172                 break;
 173
 174         case BFA_FCS_ITNIM_SM_RSP_ERROR:
 175                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_prli_retry);
 176                 bfa_timer_start(itnim->fcs->bfa, &itnim->timer,
 177                                 bfa_fcs_itnim_timeout, itnim,
 178                                 BFA_FCS_RETRY_TIMEOUT);
 179                 break;
 180
 181         case BFA_FCS_ITNIM_SM_OFFLINE:
 182                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
 183                 bfa_fcxp_discard(itnim->fcxp);
 184                 bfa_sm_send_event(itnim->rport, RPSM_EVENT_FC4_OFFLINE);
 185                 break;
 186
 187         case BFA_FCS_ITNIM_SM_INITIATOR:
 188                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_initiator);
 189                 bfa_fcxp_discard(itnim->fcxp);
 190                 break;
 191
 192         case BFA_FCS_ITNIM_SM_DELETE:
 193                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
 194                 bfa_fcxp_discard(itnim->fcxp);
 195                 bfa_fcs_itnim_free(itnim);
 196                 break;
 197
 198         default:
 199                 bfa_sm_fault(itnim->fcs, event);
 200         }
 201 }
 202
 203 static void
 204 bfa_fcs_itnim_sm_prli_retry(struct bfa_fcs_itnim_s *itnim,
 205                             enum bfa_fcs_itnim_event event)
 206 {
 207         bfa_trc(itnim->fcs, itnim->rport->pwwn);
 208         bfa_trc(itnim->fcs, event);
 209
 210         switch (event) {
 211         case BFA_FCS_ITNIM_SM_TIMEOUT:
 212                 if (itnim->prli_retries < BFA_FCS_RPORT_MAX_RETRIES) {
 213                         itnim->prli_retries++;
 214                         bfa_trc(itnim->fcs, itnim->prli_retries);
 215                         bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_prli_send);
 216                         bfa_fcs_itnim_send_prli(itnim, NULL);
 217                 } else {
 218                         /* invoke target offline */
 219                         bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
 220                         bfa_sm_send_event(itnim->rport, RPSM_EVENT_LOGO_IMP);
 221                 }
 222                 break;
 223
 224
 225         case BFA_FCS_ITNIM_SM_OFFLINE:
 226                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
 227                 bfa_timer_stop(&itnim->timer);
 228                 bfa_sm_send_event(itnim->rport, RPSM_EVENT_FC4_OFFLINE);
 229                 break;
 230
 231         case BFA_FCS_ITNIM_SM_INITIATOR:
 232                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_initiator);
 233                 bfa_timer_stop(&itnim->timer);
 234                 break;
 235
 236         case BFA_FCS_ITNIM_SM_DELETE:
 237                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
 238                 bfa_timer_stop(&itnim->timer);
 239                 bfa_fcs_itnim_free(itnim);
 240                 break;
 241
 242         default:
 243                 bfa_sm_fault(itnim->fcs, event);
 244         }
 245 }
 246
 247 static void
 248 bfa_fcs_itnim_sm_hcb_online(struct bfa_fcs_itnim_s *itnim,
 249                             enum bfa_fcs_itnim_event event)
 250 {
 251         struct bfad_s *bfad = (struct bfad_s *)itnim->fcs->bfad;
 252         char    lpwwn_buf[BFA_STRING_32];
 253         char    rpwwn_buf[BFA_STRING_32];
 254
 255         bfa_trc(itnim->fcs, itnim->rport->pwwn);
 256         bfa_trc(itnim->fcs, event);
 257
 258         switch (event) {
 259         case BFA_FCS_ITNIM_SM_HCB_ONLINE:
 260                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_online);
 261                 bfa_fcb_itnim_online(itnim->itnim_drv);
 262                 wwn2str(lpwwn_buf, bfa_fcs_lport_get_pwwn(itnim->rport->port));
 263                 wwn2str(rpwwn_buf, itnim->rport->pwwn);
 264                 BFA_LOG(KERN_INFO, bfad, bfa_log_level,
 265                 "Target (WWN = %s) is online for initiator (WWN = %s)\n",
 266                 rpwwn_buf, lpwwn_buf);
 267                 break;
 268
 269         case BFA_FCS_ITNIM_SM_OFFLINE:
 270                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
 271                 bfa_itnim_offline(itnim->bfa_itnim);
 272                 bfa_sm_send_event(itnim->rport, RPSM_EVENT_FC4_OFFLINE);
 273                 break;
 274
 275         case BFA_FCS_ITNIM_SM_DELETE:
 276                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
 277                 bfa_fcs_itnim_free(itnim);
 278                 break;
 279
 280         default:
 281                 bfa_sm_fault(itnim->fcs, event);
 282         }
 283 }
 284
 285 static void
 286 bfa_fcs_itnim_sm_online(struct bfa_fcs_itnim_s *itnim,
 287                  enum bfa_fcs_itnim_event event)
 288 {
 289         struct bfad_s *bfad = (struct bfad_s *)itnim->fcs->bfad;
 290         char    lpwwn_buf[BFA_STRING_32];
 291         char    rpwwn_buf[BFA_STRING_32];
 292
 293         bfa_trc(itnim->fcs, itnim->rport->pwwn);
 294         bfa_trc(itnim->fcs, event);
 295
 296         switch (event) {
 297         case BFA_FCS_ITNIM_SM_OFFLINE:
 298                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_hcb_offline);
 299                 bfa_fcb_itnim_offline(itnim->itnim_drv);
 300                 bfa_itnim_offline(itnim->bfa_itnim);
 301                 wwn2str(lpwwn_buf, bfa_fcs_lport_get_pwwn(itnim->rport->port));
 302                 wwn2str(rpwwn_buf, itnim->rport->pwwn);
 303                 if (bfa_fcs_lport_is_online(itnim->rport->port) == BFA_TRUE)
 304                         BFA_LOG(KERN_ERR, bfad, bfa_log_level,
 305                         "Target (WWN = %s) connectivity lost for "
 306                         "initiator (WWN = %s)\n", rpwwn_buf, lpwwn_buf);
 307                 else
 308                         BFA_LOG(KERN_INFO, bfad, bfa_log_level,
 309                         "Target (WWN = %s) offlined by initiator (WWN = %s)\n",
 310                         rpwwn_buf, lpwwn_buf);
 311                 break;
 312
 313         case BFA_FCS_ITNIM_SM_DELETE:
 314                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
 315                 bfa_fcs_itnim_free(itnim);
 316                 break;
 317
 318         default:
 319                 bfa_sm_fault(itnim->fcs, event);
 320         }
 321 }
 322
 323 static void
 324 bfa_fcs_itnim_sm_hcb_offline(struct bfa_fcs_itnim_s *itnim,
 325                              enum bfa_fcs_itnim_event event)
 326 {
 327         bfa_trc(itnim->fcs, itnim->rport->pwwn);
 328         bfa_trc(itnim->fcs, event);
 329
 330         switch (event) {
 331         case BFA_FCS_ITNIM_SM_HCB_OFFLINE:
 332                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
 333                 bfa_sm_send_event(itnim->rport, RPSM_EVENT_FC4_OFFLINE);
 334                 break;
 335
 336         case BFA_FCS_ITNIM_SM_DELETE:
 337                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
 338                 bfa_fcs_itnim_free(itnim);
 339                 break;
 340
 341         default:
 342                 bfa_sm_fault(itnim->fcs, event);
 343         }
 344 }
 345
 346 /*
 347  * This state is set when a discovered rport is also in intiator mode.
 348  * This ITN is marked as no_op and is not active and will not be truned into
 349  * online state.
 350  */
 351 static void
 352 bfa_fcs_itnim_sm_initiator(struct bfa_fcs_itnim_s *itnim,
 353                  enum bfa_fcs_itnim_event event)
 354 {
 355         bfa_trc(itnim->fcs, itnim->rport->pwwn);
 356         bfa_trc(itnim->fcs, event);
 357
 358         switch (event) {
 359         case BFA_FCS_ITNIM_SM_OFFLINE:
 360                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
 361                 bfa_sm_send_event(itnim->rport, RPSM_EVENT_FC4_OFFLINE);
 362                 break;
 363
 364         case BFA_FCS_ITNIM_SM_RSP_ERROR:
 365         case BFA_FCS_ITNIM_SM_ONLINE:
 366         case BFA_FCS_ITNIM_SM_INITIATOR:
 367                 break;
 368
 369         case BFA_FCS_ITNIM_SM_DELETE:
 370                 bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
 371                 bfa_fcs_itnim_free(itnim);
 372                 break;
 373
 374         default:
 375                 bfa_sm_fault(itnim->fcs, event);
 376         }
 377 }
 378
 379 static void
 380 bfa_fcs_itnim_send_prli(void *itnim_cbarg, struct bfa_fcxp_s *fcxp_alloced)
 381 {
 382         struct bfa_fcs_itnim_s *itnim = itnim_cbarg;
 383         struct bfa_fcs_rport_s *rport = itnim->rport;
 384         struct bfa_fcs_lport_s *port = rport->port;
 385         struct fchs_s   fchs;
 386         struct bfa_fcxp_s *fcxp;
 387         int             len;
 388
 389         bfa_trc(itnim->fcs, itnim->rport->pwwn);
 390
 391         fcxp = fcxp_alloced ? fcxp_alloced : bfa_fcs_fcxp_alloc(port->fcs);
 392         if (!fcxp) {
 393                 itnim->stats.fcxp_alloc_wait++;
 394                 bfa_fcs_fcxp_alloc_wait(port->fcs->bfa, &itnim->fcxp_wqe,
 395                                     bfa_fcs_itnim_send_prli, itnim);
 396                 return;
 397         }
 398         itnim->fcxp = fcxp;
 399
 400         len = fc_prli_build(&fchs, bfa_fcxp_get_reqbuf(fcxp),
 401                             itnim->rport->pid, bfa_fcs_lport_get_fcid(port), 0);
 402
 403         bfa_fcxp_send(fcxp, rport->bfa_rport, port->fabric->vf_id, port->lp_tag,
 404                       BFA_FALSE, FC_CLASS_3, len, &fchs,
 405                       bfa_fcs_itnim_prli_response, (void *)itnim,
 406                       FC_MAX_PDUSZ, FC_ELS_TOV);
 407
 408         itnim->stats.prli_sent++;
 409         bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_FRMSENT);
 410 }
 411
 412 static void
 413 bfa_fcs_itnim_prli_response(void *fcsarg, struct bfa_fcxp_s *fcxp, void *cbarg,
 414                             bfa_status_t req_status, u32 rsp_len,
 415                             u32 resid_len, struct fchs_s *rsp_fchs)
 416 {
 417         struct bfa_fcs_itnim_s *itnim = (struct bfa_fcs_itnim_s *) cbarg;
 418         struct fc_els_cmd_s *els_cmd;
 419         struct fc_prli_s *prli_resp;
 420         struct fc_ls_rjt_s *ls_rjt;
 421         struct fc_prli_params_s *sparams;
 422
 423         bfa_trc(itnim->fcs, req_status);
 424
 425         /*
 426          * Sanity Checks
 427          */
 428         if (req_status != BFA_STATUS_OK) {
 429                 itnim->stats.prli_rsp_err++;
 430                 bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_RSP_ERROR);
 431                 return;
 432         }
 433
 434         els_cmd = (struct fc_els_cmd_s *) BFA_FCXP_RSP_PLD(fcxp);
 435
 436         if (els_cmd->els_code == FC_ELS_ACC) {
 437                 prli_resp = (struct fc_prli_s *) els_cmd;
 438
 439                 if (fc_prli_rsp_parse(prli_resp, rsp_len) != FC_PARSE_OK) {
 440                         bfa_trc(itnim->fcs, rsp_len);
 441                         /*
 442                          * Check if this  r-port is also in Initiator mode.
 443                          * If so, we need to set this ITN as a no-op.
 444                          */
 445                         if (prli_resp->parampage.servparams.initiator) {
 446                                 bfa_trc(itnim->fcs, prli_resp->parampage.type);
 447                                 itnim->rport->scsi_function =
 448                                          BFA_RPORT_INITIATOR;
 449                                 itnim->stats.prli_rsp_acc++;
 450                                 bfa_sm_send_event(itnim,
 451                                                   BFA_FCS_ITNIM_SM_RSP_OK);
 452                                 return;
 453                         }
 454
 455                         itnim->stats.prli_rsp_parse_err++;
 456                         return;
 457                 }
 458                 itnim->rport->scsi_function = BFA_RPORT_TARGET;
 459
 460                 sparams = &prli_resp->parampage.servparams;
 461                 itnim->seq_rec       = sparams->retry;
 462                 itnim->rec_support   = sparams->rec_support;
 463                 itnim->task_retry_id = sparams->task_retry_id;
 464                 itnim->conf_comp     = sparams->confirm;
 465
 466                 itnim->stats.prli_rsp_acc++;
 467                 bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_RSP_OK);
 468         } else {
 469                 ls_rjt = (struct fc_ls_rjt_s *) BFA_FCXP_RSP_PLD(fcxp);
 470
 471                 bfa_trc(itnim->fcs, ls_rjt->reason_code);
 472                 bfa_trc(itnim->fcs, ls_rjt->reason_code_expl);
 473
 474                 itnim->stats.prli_rsp_rjt++;
 475                 bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_RSP_ERROR);
 476         }
 477 }
 478
 479 static void
 480 bfa_fcs_itnim_timeout(void *arg)
 481 {
 482         struct bfa_fcs_itnim_s *itnim = (struct bfa_fcs_itnim_s *) arg;
 483
 484         itnim->stats.timeout++;
 485         bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_TIMEOUT);
 486 }
 487
 488 static void
 489 bfa_fcs_itnim_free(struct bfa_fcs_itnim_s *itnim)
 490 {
 491         bfa_itnim_delete(itnim->bfa_itnim);
 492         bfa_fcb_itnim_free(itnim->fcs->bfad, itnim->itnim_drv);
 493 }
 494
 495
 496
 497 /*
 498  *  itnim_public FCS ITNIM public interfaces
 499  */
 500
 501 /*
 502  *      Called by rport when a new rport is created.
 503  *
 504  * @param[in] rport     -  remote port.
 505  */
 506 struct bfa_fcs_itnim_s *
 507 bfa_fcs_itnim_create(struct bfa_fcs_rport_s *rport)
 508 {
 509         struct bfa_fcs_lport_s *port = rport->port;
 510         struct bfa_fcs_itnim_s *itnim;
 511         struct bfad_itnim_s   *itnim_drv;
 512         struct bfa_itnim_s *bfa_itnim;
 513
 514         /*
 515          * call bfad to allocate the itnim
 516          */
 517         bfa_fcb_itnim_alloc(port->fcs->bfad, &itnim, &itnim_drv);
 518         if (itnim == NULL) {
 519                 bfa_trc(port->fcs, rport->pwwn);
 520                 return NULL;
 521         }
 522
 523         /*
 524          * Initialize itnim
 525          */
 526         itnim->rport = rport;
 527         itnim->fcs = rport->fcs;
 528         itnim->itnim_drv = itnim_drv;
 529
 530         /*
 531          * call BFA to create the itnim
 532          */
 533         bfa_itnim =
 534                 bfa_itnim_create(port->fcs->bfa, rport->bfa_rport, itnim);
 535
 536         if (bfa_itnim == NULL) {
 537                 bfa_trc(port->fcs, rport->pwwn);
 538                 bfa_fcb_itnim_free(port->fcs->bfad, itnim_drv);
 539                 WARN_ON(1);
 540                 return NULL;
 541         }
 542
 543         itnim->bfa_itnim     = bfa_itnim;
 544         itnim->seq_rec       = BFA_FALSE;
 545         itnim->rec_support   = BFA_FALSE;
 546         itnim->conf_comp     = BFA_FALSE;
 547         itnim->task_retry_id = BFA_FALSE;
 548
 549         /*
 550          * Set State machine
 551          */
 552         bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
 553
 554         return itnim;
 555 }
 556
 557 /*
 558  *      Called by rport to delete  the instance of FCPIM.
 559  *
 560  * @param[in] rport     -  remote port.
 561  */
 562 void
 563 bfa_fcs_itnim_delete(struct bfa_fcs_itnim_s *itnim)
 564 {
 565         bfa_trc(itnim->fcs, itnim->rport->pid);
 566         bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_DELETE);
 567 }
 568
 569 /*
 570  * Notification from rport that PLOGI is complete to initiate FC-4 session.
 571  */
 572 void
 573 bfa_fcs_itnim_rport_online(struct bfa_fcs_itnim_s *itnim)
 574 {
 575         itnim->stats.onlines++;
 576
 577         if (!BFA_FCS_PID_IS_WKA(itnim->rport->pid)) {
 578                 bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_ONLINE);
 579         } else {
 580                 /*
 581                  *  For well known addresses, we set the itnim to initiator
 582                  *  state
 583                  */
 584                 itnim->stats.initiator++;
 585                 bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_INITIATOR);
 586         }
 587 }
 588
 589 /*
 590  * Called by rport to handle a remote device offline.
 591  */
 592 void
 593 bfa_fcs_itnim_rport_offline(struct bfa_fcs_itnim_s *itnim)
 594 {
 595         itnim->stats.offlines++;
 596         bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_OFFLINE);
 597 }
 598
 599 /*
 600  * Called by rport when remote port is known to be an initiator from
 601  * PRLI received.
 602  */
 603 void
 604 bfa_fcs_itnim_is_initiator(struct bfa_fcs_itnim_s *itnim)
 605 {
 606         bfa_trc(itnim->fcs, itnim->rport->pid);
 607         itnim->stats.initiator++;
 608         bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_INITIATOR);
 609 }
 610
 611 /*
 612  * Called by rport to check if the itnim is online.
 613  */
 614 bfa_status_t
 615 bfa_fcs_itnim_get_online_state(struct bfa_fcs_itnim_s *itnim)
 616 {
 617         bfa_trc(itnim->fcs, itnim->rport->pid);
 618         switch (bfa_sm_to_state(itnim_sm_table, itnim->sm)) {
 619         case BFA_ITNIM_ONLINE:
 620         case BFA_ITNIM_INITIATIOR:
 621                 return BFA_STATUS_OK;
 622
 623         default:
 624                 return BFA_STATUS_NO_FCPIM_NEXUS;
 625         }
 626 }
 627
 628 /*
 629  * BFA completion callback for bfa_itnim_online().
 630  */
 631 void
 632 bfa_cb_itnim_online(void *cbarg)
 633 {
 634         struct bfa_fcs_itnim_s *itnim = (struct bfa_fcs_itnim_s *) cbarg;
 635
 636         bfa_trc(itnim->fcs, itnim->rport->pwwn);
 637         bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_HCB_ONLINE);
 638 }
 639
 640 /*
 641  * BFA completion callback for bfa_itnim_offline().
 642  */
 643 void
 644 bfa_cb_itnim_offline(void *cb_arg)
 645 {
 646         struct bfa_fcs_itnim_s *itnim = (struct bfa_fcs_itnim_s *) cb_arg;
 647
 648         bfa_trc(itnim->fcs, itnim->rport->pwwn);
 649         bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_HCB_OFFLINE);
 650 }
 651
 652 /*
 653  * Mark the beginning of PATH TOV handling. IO completion callbacks
 654  * are still pending.
 655  */
 656 void
 657 bfa_cb_itnim_tov_begin(void *cb_arg)
 658 {
 659         struct bfa_fcs_itnim_s *itnim = (struct bfa_fcs_itnim_s *) cb_arg;
 660
 661         bfa_trc(itnim->fcs, itnim->rport->pwwn);
 662 }
 663
 664 /*
 665  * Mark the end of PATH TOV handling. All pending IOs are already cleaned up.
 666  */
 667 void
 668 bfa_cb_itnim_tov(void *cb_arg)
 669 {
 670         struct bfa_fcs_itnim_s *itnim = (struct bfa_fcs_itnim_s *) cb_arg;
 671         struct bfad_itnim_s *itnim_drv = itnim->itnim_drv;
 672
 673         bfa_trc(itnim->fcs, itnim->rport->pwwn);
 674         itnim_drv->state = ITNIM_STATE_TIMEOUT;
 675 }
 676
 677 /*
 678  *              BFA notification to FCS/driver for second level error recovery.
 679  *
 680  * Atleast one I/O request has timedout and target is unresponsive to
 681  * repeated abort requests. Second level error recovery should be initiated
 682  * by starting implicit logout and recovery procedures.
 683  */
 684 void
 685 bfa_cb_itnim_sler(void *cb_arg)
 686 {
 687         struct bfa_fcs_itnim_s *itnim = (struct bfa_fcs_itnim_s *) cb_arg;
 688
 689         itnim->stats.sler++;
 690         bfa_trc(itnim->fcs, itnim->rport->pwwn);
 691         bfa_sm_send_event(itnim->rport, RPSM_EVENT_LOGO_IMP);
 692 }
 693
 694 struct bfa_fcs_itnim_s *
 695 bfa_fcs_itnim_lookup(struct bfa_fcs_lport_s *port, wwn_t rpwwn)
 696 {
 697         struct bfa_fcs_rport_s *rport;
 698         rport = bfa_fcs_rport_lookup(port, rpwwn);
 699
 700         if (!rport)
 701                 return NULL;
 702
 703         WARN_ON(rport->itnim == NULL);
 704         return rport->itnim;
 705 }
 706
 707 bfa_status_t
 708 bfa_fcs_itnim_attr_get(struct bfa_fcs_lport_s *port, wwn_t rpwwn,
 709                        struct bfa_itnim_attr_s *attr)
 710 {
 711         struct bfa_fcs_itnim_s *itnim = NULL;
 712
 713         itnim = bfa_fcs_itnim_lookup(port, rpwwn);
 714
 715         if (itnim == NULL)
 716                 return BFA_STATUS_NO_FCPIM_NEXUS;
 717
 718         attr->state         = bfa_sm_to_state(itnim_sm_table, itnim->sm);
 719         attr->retry         = itnim->seq_rec;
 720         attr->rec_support   = itnim->rec_support;
 721         attr->conf_comp     = itnim->conf_comp;
 722         attr->task_retry_id = itnim->task_retry_id;
 723         return BFA_STATUS_OK;
 724 }
 725
 726 bfa_status_t
 727 bfa_fcs_itnim_stats_get(struct bfa_fcs_lport_s *port, wwn_t rpwwn,
 728                         struct bfa_itnim_stats_s *stats)
 729 {
 730         struct bfa_fcs_itnim_s *itnim = NULL;
 731
 732         WARN_ON(port == NULL);
 733
 734         itnim = bfa_fcs_itnim_lookup(port, rpwwn);
 735
 736         if (itnim == NULL)
 737                 return BFA_STATUS_NO_FCPIM_NEXUS;
 738
 739         memcpy(stats, &itnim->stats, sizeof(struct bfa_itnim_stats_s));
 740
 741         return BFA_STATUS_OK;
 742 }
 743
 744 bfa_status_t
 745 bfa_fcs_itnim_stats_clear(struct bfa_fcs_lport_s *port, wwn_t rpwwn)
 746 {
 747         struct bfa_fcs_itnim_s *itnim = NULL;
 748
 749         WARN_ON(port == NULL);
 750
 751         itnim = bfa_fcs_itnim_lookup(port, rpwwn);
 752
 753         if (itnim == NULL)
 754                 return BFA_STATUS_NO_FCPIM_NEXUS;
 755
 756         memset(&itnim->stats, 0, sizeof(struct bfa_itnim_stats_s));
 757         return BFA_STATUS_OK;
 758 }
 759
 760 void
 761 bfa_fcs_fcpim_uf_recv(struct bfa_fcs_itnim_s *itnim,
 762                         struct fchs_s *fchs, u16 len)
 763 {
 764         struct fc_els_cmd_s *els_cmd;
 765
 766         bfa_trc(itnim->fcs, fchs->type);
 767
 768         if (fchs->type != FC_TYPE_ELS)
 769                 return;
 770
 771         els_cmd = (struct fc_els_cmd_s *) (fchs + 1);
 772
 773         bfa_trc(itnim->fcs, els_cmd->els_code);
 774
 775         switch (els_cmd->els_code) {
 776         case FC_ELS_PRLO:
 777                 bfa_fcs_rport_prlo(itnim->rport, fchs->ox_id);
 778                 break;
 779
 780         default:
 781                 WARN_ON(1);
 782         }
 783 }