drivers/scsi/bfa/rport_ftrs.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 /**
  19  *  rport_ftrs.c Remote port features (RPF) implementation.
  20  */
  21
  22 #include <bfa.h>
  23 #include <bfa_svc.h>
  24 #include "fcbuild.h"
  25 #include "fcs_rport.h"
  26 #include "fcs_lport.h"
  27 #include "fcs_trcmod.h"
  28 #include "fcs_fcxp.h"
  29 #include "fcs.h"
  30
  31 BFA_TRC_FILE(FCS, RPORT_FTRS);
  32
  33 #define BFA_FCS_RPF_RETRIES     (3)
  34 #define BFA_FCS_RPF_RETRY_TIMEOUT  (1000) /* 1 sec (In millisecs) */
  35
  36 static void     bfa_fcs_rpf_send_rpsc2(void *rport_cbarg,
  37                         struct bfa_fcxp_s *fcxp_alloced);
  38 static void     bfa_fcs_rpf_rpsc2_response(void *fcsarg,
  39                         struct bfa_fcxp_s *fcxp, void *cbarg,
  40                         bfa_status_t req_status, u32 rsp_len,
  41                         u32 resid_len,
  42                         struct fchs_s *rsp_fchs);
  43 static void     bfa_fcs_rpf_timeout(void *arg);
  44
  45 /**
  46  *  fcs_rport_ftrs_sm FCS rport state machine events
  47  */
  48
  49 enum rpf_event {
  50         RPFSM_EVENT_RPORT_OFFLINE  = 1,     /*  Rport offline            */
  51         RPFSM_EVENT_RPORT_ONLINE   = 2,     /*  Rport online            */
  52         RPFSM_EVENT_FCXP_SENT      = 3,    /*  Frame from has been sent */
  53         RPFSM_EVENT_TIMEOUT        = 4,    /*  Rport SM timeout event   */
  54         RPFSM_EVENT_RPSC_COMP      = 5,
  55         RPFSM_EVENT_RPSC_FAIL      = 6,
  56         RPFSM_EVENT_RPSC_ERROR     = 7,
  57 };
  58
  59 static void     bfa_fcs_rpf_sm_uninit(struct bfa_fcs_rpf_s *rpf,
  60                                         enum rpf_event event);
  61 static void     bfa_fcs_rpf_sm_rpsc_sending(struct bfa_fcs_rpf_s *rpf,
  62                                                enum rpf_event event);
  63 static void     bfa_fcs_rpf_sm_rpsc(struct bfa_fcs_rpf_s *rpf,
  64                                                enum rpf_event event);
  65 static void     bfa_fcs_rpf_sm_rpsc_retry(struct bfa_fcs_rpf_s *rpf,
  66                                                         enum rpf_event event);
  67 static void     bfa_fcs_rpf_sm_offline(struct bfa_fcs_rpf_s *rpf,
  68                                                         enum rpf_event event);
  69 static void     bfa_fcs_rpf_sm_online(struct bfa_fcs_rpf_s *rpf,
  70                                                         enum rpf_event event);
  71
  72 static void
  73 bfa_fcs_rpf_sm_uninit(struct bfa_fcs_rpf_s *rpf, enum rpf_event event)
  74 {
  75         struct bfa_fcs_rport_s *rport = rpf->rport;
  76
  77         bfa_trc(rport->fcs, rport->pwwn);
  78         bfa_trc(rport->fcs, rport->pid);
  79         bfa_trc(rport->fcs, event);
  80
  81         switch (event) {
  82         case RPFSM_EVENT_RPORT_ONLINE:
  83                 if (!BFA_FCS_PID_IS_WKA(rport->pid)) {
  84                         bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_rpsc_sending);
  85                         rpf->rpsc_retries = 0;
  86                         bfa_fcs_rpf_send_rpsc2(rpf, NULL);
  87                         break;
  88                 };
  89
  90         case RPFSM_EVENT_RPORT_OFFLINE:
  91                 break;
  92
  93         default:
  94                 bfa_sm_fault(rport->fcs, event);
  95         }
  96 }
  97
  98 static void
  99 bfa_fcs_rpf_sm_rpsc_sending(struct bfa_fcs_rpf_s *rpf, enum rpf_event event)
 100 {
 101         struct bfa_fcs_rport_s *rport = rpf->rport;
 102
 103         bfa_trc(rport->fcs, event);
 104
 105         switch (event) {
 106         case RPFSM_EVENT_FCXP_SENT:
 107                 bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_rpsc);
 108                 break;
 109
 110         case RPFSM_EVENT_RPORT_OFFLINE:
 111                 bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_offline);
 112                 bfa_fcxp_walloc_cancel(rport->fcs->bfa, &rpf->fcxp_wqe);
 113                 rpf->rpsc_retries = 0;
 114                 break;
 115
 116         default:
 117                 bfa_sm_fault(rport->fcs, event);
 118         }
 119 }
 120
 121 static void
 122 bfa_fcs_rpf_sm_rpsc(struct bfa_fcs_rpf_s *rpf, enum rpf_event event)
 123 {
 124         struct bfa_fcs_rport_s *rport = rpf->rport;
 125
 126         bfa_trc(rport->fcs, rport->pid);
 127         bfa_trc(rport->fcs, event);
 128
 129         switch (event) {
 130         case RPFSM_EVENT_RPSC_COMP:
 131                 bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_online);
 132                 /* Update speed info in f/w via BFA */
 133                 if (rpf->rpsc_speed != BFA_PPORT_SPEED_UNKNOWN)
 134                         bfa_rport_speed(rport->bfa_rport, rpf->rpsc_speed);
 135                 else if (rpf->assigned_speed != BFA_PPORT_SPEED_UNKNOWN)
 136                         bfa_rport_speed(rport->bfa_rport, rpf->assigned_speed);
 137                 break;
 138
 139         case RPFSM_EVENT_RPSC_FAIL:
 140                 /* RPSC not supported by rport */
 141                 bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_online);
 142                 break;
 143
 144         case RPFSM_EVENT_RPSC_ERROR:
 145                 /* need to retry...delayed a bit. */
 146                 if (rpf->rpsc_retries++ < BFA_FCS_RPF_RETRIES) {
 147                         bfa_timer_start(rport->fcs->bfa, &rpf->timer,
 148                                     bfa_fcs_rpf_timeout, rpf,
 149                                     BFA_FCS_RPF_RETRY_TIMEOUT);
 150                         bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_rpsc_retry);
 151                 } else {
 152                         bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_online);
 153                 }
 154                 break;
 155
 156         case RPFSM_EVENT_RPORT_OFFLINE:
 157                 bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_offline);
 158                 bfa_fcxp_discard(rpf->fcxp);
 159                 rpf->rpsc_retries = 0;
 160                 break;
 161
 162         default:
 163                 bfa_sm_fault(rport->fcs, event);
 164         }
 165 }
 166
 167 static void
 168 bfa_fcs_rpf_sm_rpsc_retry(struct bfa_fcs_rpf_s *rpf, enum rpf_event event)
 169 {
 170         struct bfa_fcs_rport_s *rport = rpf->rport;
 171
 172         bfa_trc(rport->fcs, rport->pid);
 173         bfa_trc(rport->fcs, event);
 174
 175         switch (event) {
 176         case RPFSM_EVENT_TIMEOUT:
 177                 /* re-send the RPSC */
 178                 bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_rpsc_sending);
 179                 bfa_fcs_rpf_send_rpsc2(rpf, NULL);
 180                 break;
 181
 182         case RPFSM_EVENT_RPORT_OFFLINE:
 183                 bfa_timer_stop(&rpf->timer);
 184                 bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_offline);
 185                 rpf->rpsc_retries = 0;
 186                 break;
 187
 188         default:
 189                 bfa_sm_fault(rport->fcs, event);
 190         }
 191 }
 192
 193 static void
 194 bfa_fcs_rpf_sm_online(struct bfa_fcs_rpf_s *rpf, enum rpf_event event)
 195 {
 196         struct bfa_fcs_rport_s *rport = rpf->rport;
 197
 198         bfa_trc(rport->fcs, rport->pwwn);
 199         bfa_trc(rport->fcs, rport->pid);
 200         bfa_trc(rport->fcs, event);
 201
 202         switch (event) {
 203         case RPFSM_EVENT_RPORT_OFFLINE:
 204                 bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_offline);
 205                 rpf->rpsc_retries = 0;
 206                 break;
 207
 208         default:
 209                 bfa_sm_fault(rport->fcs, event);
 210         }
 211 }
 212
 213 static void
 214 bfa_fcs_rpf_sm_offline(struct bfa_fcs_rpf_s *rpf, enum rpf_event event)
 215 {
 216         struct bfa_fcs_rport_s *rport = rpf->rport;
 217
 218         bfa_trc(rport->fcs, rport->pwwn);
 219         bfa_trc(rport->fcs, rport->pid);
 220         bfa_trc(rport->fcs, event);
 221
 222         switch (event) {
 223         case RPFSM_EVENT_RPORT_ONLINE:
 224                 bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_rpsc_sending);
 225                 bfa_fcs_rpf_send_rpsc2(rpf, NULL);
 226                 break;
 227
 228         case RPFSM_EVENT_RPORT_OFFLINE:
 229                 break;
 230
 231         default:
 232                 bfa_sm_fault(rport->fcs, event);
 233         }
 234 }
 235 /**
 236  * Called when Rport is created.
 237  */
 238 void  bfa_fcs_rpf_init(struct bfa_fcs_rport_s *rport)
 239 {
 240         struct bfa_fcs_rpf_s *rpf = &rport->rpf;
 241
 242         bfa_trc(rport->fcs, rport->pid);
 243         rpf->rport = rport;
 244
 245         bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_uninit);
 246 }
 247
 248 /**
 249  * Called when Rport becomes online
 250  */
 251 void  bfa_fcs_rpf_rport_online(struct bfa_fcs_rport_s *rport)
 252 {
 253         bfa_trc(rport->fcs, rport->pid);
 254
 255         if (__fcs_min_cfg(rport->port->fcs))
 256                 return;
 257
 258         if (bfa_fcs_fabric_is_switched(rport->port->fabric))
 259                 bfa_sm_send_event(&rport->rpf, RPFSM_EVENT_RPORT_ONLINE);
 260 }
 261
 262 /**
 263  * Called when Rport becomes offline
 264  */
 265 void  bfa_fcs_rpf_rport_offline(struct bfa_fcs_rport_s *rport)
 266 {
 267         bfa_trc(rport->fcs, rport->pid);
 268
 269         if (__fcs_min_cfg(rport->port->fcs))
 270                 return;
 271
 272         bfa_sm_send_event(&rport->rpf, RPFSM_EVENT_RPORT_OFFLINE);
 273 }
 274
 275 static void
 276 bfa_fcs_rpf_timeout(void *arg)
 277 {
 278         struct bfa_fcs_rpf_s *rpf = (struct bfa_fcs_rpf_s *) arg;
 279         struct bfa_fcs_rport_s *rport = rpf->rport;
 280
 281         bfa_trc(rport->fcs, rport->pid);
 282         bfa_sm_send_event(rpf, RPFSM_EVENT_TIMEOUT);
 283 }
 284
 285 static void
 286 bfa_fcs_rpf_send_rpsc2(void *rpf_cbarg, struct bfa_fcxp_s *fcxp_alloced)
 287 {
 288         struct bfa_fcs_rpf_s *rpf       = (struct bfa_fcs_rpf_s *)rpf_cbarg;
 289         struct bfa_fcs_rport_s *rport = rpf->rport;
 290         struct bfa_fcs_port_s *port = rport->port;
 291         struct fchs_s          fchs;
 292         int             len;
 293         struct bfa_fcxp_s *fcxp;
 294
 295         bfa_trc(rport->fcs, rport->pwwn);
 296
 297         fcxp = fcxp_alloced ? fcxp_alloced : bfa_fcs_fcxp_alloc(port->fcs);
 298         if (!fcxp) {
 299                 bfa_fcxp_alloc_wait(port->fcs->bfa, &rpf->fcxp_wqe,
 300                                         bfa_fcs_rpf_send_rpsc2, rpf);
 301                 return;
 302         }
 303         rpf->fcxp = fcxp;
 304
 305         len = fc_rpsc2_build(&fchs, bfa_fcxp_get_reqbuf(fcxp), rport->pid,
 306                             bfa_fcs_port_get_fcid(port), &rport->pid, 1);
 307
 308         bfa_fcxp_send(fcxp, NULL, port->fabric->vf_id, port->lp_tag, BFA_FALSE,
 309                           FC_CLASS_3, len, &fchs, bfa_fcs_rpf_rpsc2_response,
 310                           rpf, FC_MAX_PDUSZ, FC_RA_TOV);
 311         rport->stats.rpsc_sent++;
 312         bfa_sm_send_event(rpf, RPFSM_EVENT_FCXP_SENT);
 313
 314 }
 315
 316 static void
 317 bfa_fcs_rpf_rpsc2_response(void *fcsarg, struct bfa_fcxp_s *fcxp, void *cbarg,
 318                             bfa_status_t req_status, u32 rsp_len,
 319                             u32 resid_len, struct fchs_s *rsp_fchs)
 320 {
 321         struct bfa_fcs_rpf_s *rpf = (struct bfa_fcs_rpf_s *) cbarg;
 322         struct bfa_fcs_rport_s *rport = rpf->rport;
 323         struct fc_ls_rjt_s    *ls_rjt;
 324         struct fc_rpsc2_acc_s  *rpsc2_acc;
 325         u16        num_ents;
 326
 327         bfa_trc(rport->fcs, req_status);
 328
 329         if (req_status != BFA_STATUS_OK) {
 330                 bfa_trc(rport->fcs, req_status);
 331                 if (req_status == BFA_STATUS_ETIMER)
 332                         rport->stats.rpsc_failed++;
 333                 bfa_sm_send_event(rpf, RPFSM_EVENT_RPSC_ERROR);
 334                 return;
 335         }
 336
 337         rpsc2_acc = (struct fc_rpsc2_acc_s *) BFA_FCXP_RSP_PLD(fcxp);
 338         if (rpsc2_acc->els_cmd == FC_ELS_ACC) {
 339                 rport->stats.rpsc_accs++;
 340                 num_ents = bfa_os_ntohs(rpsc2_acc->num_pids);
 341                 bfa_trc(rport->fcs, num_ents);
 342                 if (num_ents > 0) {
 343                         bfa_assert(rpsc2_acc->port_info[0].pid != rport->pid);
 344                         bfa_trc(rport->fcs,
 345                                 bfa_os_ntohs(rpsc2_acc->port_info[0].pid));
 346                         bfa_trc(rport->fcs,
 347                                 bfa_os_ntohs(rpsc2_acc->port_info[0].speed));
 348                         bfa_trc(rport->fcs,
 349                                 bfa_os_ntohs(rpsc2_acc->port_info[0].index));
 350                         bfa_trc(rport->fcs,
 351                                 rpsc2_acc->port_info[0].type);
 352
 353                         if (rpsc2_acc->port_info[0].speed == 0) {
 354                                 bfa_sm_send_event(rpf, RPFSM_EVENT_RPSC_ERROR);
 355                                 return;
 356                         }
 357
 358                         rpf->rpsc_speed = fc_rpsc_operspeed_to_bfa_speed(
 359                                 bfa_os_ntohs(rpsc2_acc->port_info[0].speed));
 360
 361                         bfa_sm_send_event(rpf, RPFSM_EVENT_RPSC_COMP);
 362                 }
 363         } else {
 364                 ls_rjt = (struct fc_ls_rjt_s *) BFA_FCXP_RSP_PLD(fcxp);
 365                 bfa_trc(rport->fcs, ls_rjt->reason_code);
 366                 bfa_trc(rport->fcs, ls_rjt->reason_code_expl);
 367                 rport->stats.rpsc_rejects++;
 368                 if (ls_rjt->reason_code == FC_LS_RJT_RSN_CMD_NOT_SUPP)
 369                         bfa_sm_send_event(rpf, RPFSM_EVENT_RPSC_FAIL);
 370                 else
 371                         bfa_sm_send_event(rpf, RPFSM_EVENT_RPSC_ERROR);
 372         }
 373 }