release/src-rt-6.x.4708/linux/linux-2.6.36/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         struct bfa_fcs_fabric_s *fabric = &rport->fcs->fabric;
  77
  78         bfa_trc(rport->fcs, rport->pwwn);
  79         bfa_trc(rport->fcs, rport->pid);
  80         bfa_trc(rport->fcs, event);
  81
  82         switch (event) {
  83         case RPFSM_EVENT_RPORT_ONLINE:
  84                 /* Send RPSC2 to a Brocade fabric only. */
  85                 if ((!BFA_FCS_PID_IS_WKA(rport->pid)) &&
  86                         ((bfa_lps_is_brcd_fabric(rport->port->fabric->lps)) ||
  87                         (bfa_fcs_fabric_get_switch_oui(fabric) ==
  88                                                 BFA_FCS_BRCD_SWITCH_OUI))) {
  89                         bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_rpsc_sending);
  90                         rpf->rpsc_retries = 0;
  91                         bfa_fcs_rpf_send_rpsc2(rpf, NULL);
  92                 }
  93                 break;
  94
  95         case RPFSM_EVENT_RPORT_OFFLINE:
  96                 break;
  97
  98         default:
  99                 bfa_sm_fault(rport->fcs, event);
 100         }
 101 }
 102
 103 static void
 104 bfa_fcs_rpf_sm_rpsc_sending(struct bfa_fcs_rpf_s *rpf, enum rpf_event event)
 105 {
 106         struct bfa_fcs_rport_s *rport = rpf->rport;
 107
 108         bfa_trc(rport->fcs, event);
 109
 110         switch (event) {
 111         case RPFSM_EVENT_FCXP_SENT:
 112                 bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_rpsc);
 113                 break;
 114
 115         case RPFSM_EVENT_RPORT_OFFLINE:
 116                 bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_offline);
 117                 bfa_fcxp_walloc_cancel(rport->fcs->bfa, &rpf->fcxp_wqe);
 118                 rpf->rpsc_retries = 0;
 119                 break;
 120
 121         default:
 122                 bfa_sm_fault(rport->fcs, event);
 123         }
 124 }
 125
 126 static void
 127 bfa_fcs_rpf_sm_rpsc(struct bfa_fcs_rpf_s *rpf, enum rpf_event event)
 128 {
 129         struct bfa_fcs_rport_s *rport = rpf->rport;
 130
 131         bfa_trc(rport->fcs, rport->pid);
 132         bfa_trc(rport->fcs, event);
 133
 134         switch (event) {
 135         case RPFSM_EVENT_RPSC_COMP:
 136                 bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_online);
 137                 /* Update speed info in f/w via BFA */
 138                 if (rpf->rpsc_speed != BFA_PPORT_SPEED_UNKNOWN)
 139                         bfa_rport_speed(rport->bfa_rport, rpf->rpsc_speed);
 140                 else if (rpf->assigned_speed != BFA_PPORT_SPEED_UNKNOWN)
 141                         bfa_rport_speed(rport->bfa_rport, rpf->assigned_speed);
 142                 break;
 143
 144         case RPFSM_EVENT_RPSC_FAIL:
 145                 /* RPSC not supported by rport */
 146                 bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_online);
 147                 break;
 148
 149         case RPFSM_EVENT_RPSC_ERROR:
 150                 /* need to retry...delayed a bit. */
 151                 if (rpf->rpsc_retries++ < BFA_FCS_RPF_RETRIES) {
 152                         bfa_timer_start(rport->fcs->bfa, &rpf->timer,
 153                                     bfa_fcs_rpf_timeout, rpf,
 154                                     BFA_FCS_RPF_RETRY_TIMEOUT);
 155                         bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_rpsc_retry);
 156                 } else {
 157                         bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_online);
 158                 }
 159                 break;
 160
 161         case RPFSM_EVENT_RPORT_OFFLINE:
 162                 bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_offline);
 163                 bfa_fcxp_discard(rpf->fcxp);
 164                 rpf->rpsc_retries = 0;
 165                 break;
 166
 167         default:
 168                 bfa_sm_fault(rport->fcs, event);
 169         }
 170 }
 171
 172 static void
 173 bfa_fcs_rpf_sm_rpsc_retry(struct bfa_fcs_rpf_s *rpf, enum rpf_event event)
 174 {
 175         struct bfa_fcs_rport_s *rport = rpf->rport;
 176
 177         bfa_trc(rport->fcs, rport->pid);
 178         bfa_trc(rport->fcs, event);
 179
 180         switch (event) {
 181         case RPFSM_EVENT_TIMEOUT:
 182                 /* re-send the RPSC */
 183                 bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_rpsc_sending);
 184                 bfa_fcs_rpf_send_rpsc2(rpf, NULL);
 185                 break;
 186
 187         case RPFSM_EVENT_RPORT_OFFLINE:
 188                 bfa_timer_stop(&rpf->timer);
 189                 bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_offline);
 190                 rpf->rpsc_retries = 0;
 191                 break;
 192
 193         default:
 194                 bfa_sm_fault(rport->fcs, event);
 195         }
 196 }
 197
 198 static void
 199 bfa_fcs_rpf_sm_online(struct bfa_fcs_rpf_s *rpf, enum rpf_event event)
 200 {
 201         struct bfa_fcs_rport_s *rport = rpf->rport;
 202
 203         bfa_trc(rport->fcs, rport->pwwn);
 204         bfa_trc(rport->fcs, rport->pid);
 205         bfa_trc(rport->fcs, event);
 206
 207         switch (event) {
 208         case RPFSM_EVENT_RPORT_OFFLINE:
 209                 bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_offline);
 210                 rpf->rpsc_retries = 0;
 211                 break;
 212
 213         default:
 214                 bfa_sm_fault(rport->fcs, event);
 215         }
 216 }
 217
 218 static void
 219 bfa_fcs_rpf_sm_offline(struct bfa_fcs_rpf_s *rpf, enum rpf_event event)
 220 {
 221         struct bfa_fcs_rport_s *rport = rpf->rport;
 222
 223         bfa_trc(rport->fcs, rport->pwwn);
 224         bfa_trc(rport->fcs, rport->pid);
 225         bfa_trc(rport->fcs, event);
 226
 227         switch (event) {
 228         case RPFSM_EVENT_RPORT_ONLINE:
 229                 bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_rpsc_sending);
 230                 bfa_fcs_rpf_send_rpsc2(rpf, NULL);
 231                 break;
 232
 233         case RPFSM_EVENT_RPORT_OFFLINE:
 234                 break;
 235
 236         default:
 237                 bfa_sm_fault(rport->fcs, event);
 238         }
 239 }
 240 /**
 241  * Called when Rport is created.
 242  */
 243 void  bfa_fcs_rpf_init(struct bfa_fcs_rport_s *rport)
 244 {
 245         struct bfa_fcs_rpf_s *rpf = &rport->rpf;
 246
 247         bfa_trc(rport->fcs, rport->pid);
 248         rpf->rport = rport;
 249
 250         bfa_sm_set_state(rpf, bfa_fcs_rpf_sm_uninit);
 251 }
 252
 253 /**
 254  * Called when Rport becomes online
 255  */
 256 void  bfa_fcs_rpf_rport_online(struct bfa_fcs_rport_s *rport)
 257 {
 258         bfa_trc(rport->fcs, rport->pid);
 259
 260         if (__fcs_min_cfg(rport->port->fcs))
 261                 return;
 262
 263         if (bfa_fcs_fabric_is_switched(rport->port->fabric))
 264                 bfa_sm_send_event(&rport->rpf, RPFSM_EVENT_RPORT_ONLINE);
 265 }
 266
 267 /**
 268  * Called when Rport becomes offline
 269  */
 270 void  bfa_fcs_rpf_rport_offline(struct bfa_fcs_rport_s *rport)
 271 {
 272         bfa_trc(rport->fcs, rport->pid);
 273
 274         if (__fcs_min_cfg(rport->port->fcs))
 275                 return;
 276
 277         rport->rpf.rpsc_speed = 0;
 278         bfa_sm_send_event(&rport->rpf, RPFSM_EVENT_RPORT_OFFLINE);
 279 }
 280
 281 static void
 282 bfa_fcs_rpf_timeout(void *arg)
 283 {
 284         struct bfa_fcs_rpf_s *rpf = (struct bfa_fcs_rpf_s *) arg;
 285         struct bfa_fcs_rport_s *rport = rpf->rport;
 286
 287         bfa_trc(rport->fcs, rport->pid);
 288         bfa_sm_send_event(rpf, RPFSM_EVENT_TIMEOUT);
 289 }
 290
 291 static void
 292 bfa_fcs_rpf_send_rpsc2(void *rpf_cbarg, struct bfa_fcxp_s *fcxp_alloced)
 293 {
 294         struct bfa_fcs_rpf_s *rpf       = (struct bfa_fcs_rpf_s *)rpf_cbarg;
 295         struct bfa_fcs_rport_s *rport = rpf->rport;
 296         struct bfa_fcs_port_s *port = rport->port;
 297         struct fchs_s          fchs;
 298         int             len;
 299         struct bfa_fcxp_s *fcxp;
 300
 301         bfa_trc(rport->fcs, rport->pwwn);
 302
 303         fcxp = fcxp_alloced ? fcxp_alloced : bfa_fcs_fcxp_alloc(port->fcs);
 304         if (!fcxp) {
 305                 bfa_fcxp_alloc_wait(port->fcs->bfa, &rpf->fcxp_wqe,
 306                                         bfa_fcs_rpf_send_rpsc2, rpf);
 307                 return;
 308         }
 309         rpf->fcxp = fcxp;
 310
 311         len = fc_rpsc2_build(&fchs, bfa_fcxp_get_reqbuf(fcxp), rport->pid,
 312                             bfa_fcs_port_get_fcid(port), &rport->pid, 1);
 313
 314         bfa_fcxp_send(fcxp, NULL, port->fabric->vf_id, port->lp_tag, BFA_FALSE,
 315                           FC_CLASS_3, len, &fchs, bfa_fcs_rpf_rpsc2_response,
 316                           rpf, FC_MAX_PDUSZ, FC_ELS_TOV);
 317         rport->stats.rpsc_sent++;
 318         bfa_sm_send_event(rpf, RPFSM_EVENT_FCXP_SENT);
 319
 320 }
 321
 322 static void
 323 bfa_fcs_rpf_rpsc2_response(void *fcsarg, struct bfa_fcxp_s *fcxp, void *cbarg,
 324                             bfa_status_t req_status, u32 rsp_len,
 325                             u32 resid_len, struct fchs_s *rsp_fchs)
 326 {
 327         struct bfa_fcs_rpf_s *rpf = (struct bfa_fcs_rpf_s *) cbarg;
 328         struct bfa_fcs_rport_s *rport = rpf->rport;
 329         struct fc_ls_rjt_s    *ls_rjt;
 330         struct fc_rpsc2_acc_s  *rpsc2_acc;
 331         u16        num_ents;
 332
 333         bfa_trc(rport->fcs, req_status);
 334
 335         if (req_status != BFA_STATUS_OK) {
 336                 bfa_trc(rport->fcs, req_status);
 337                 if (req_status == BFA_STATUS_ETIMER)
 338                         rport->stats.rpsc_failed++;
 339                 bfa_sm_send_event(rpf, RPFSM_EVENT_RPSC_ERROR);
 340                 return;
 341         }
 342
 343         rpsc2_acc = (struct fc_rpsc2_acc_s *) BFA_FCXP_RSP_PLD(fcxp);
 344         if (rpsc2_acc->els_cmd == FC_ELS_ACC) {
 345                 rport->stats.rpsc_accs++;
 346                 num_ents = bfa_os_ntohs(rpsc2_acc->num_pids);
 347                 bfa_trc(rport->fcs, num_ents);
 348                 if (num_ents > 0) {
 349                         bfa_assert(rpsc2_acc->port_info[0].pid != rport->pid);
 350                         bfa_trc(rport->fcs,
 351                                 bfa_os_ntohs(rpsc2_acc->port_info[0].pid));
 352                         bfa_trc(rport->fcs,
 353                                 bfa_os_ntohs(rpsc2_acc->port_info[0].speed));
 354                         bfa_trc(rport->fcs,
 355                                 bfa_os_ntohs(rpsc2_acc->port_info[0].index));
 356                         bfa_trc(rport->fcs,
 357                                 rpsc2_acc->port_info[0].type);
 358
 359                         if (rpsc2_acc->port_info[0].speed == 0) {
 360                                 bfa_sm_send_event(rpf, RPFSM_EVENT_RPSC_ERROR);
 361                                 return;
 362                         }
 363
 364                         rpf->rpsc_speed = fc_rpsc_operspeed_to_bfa_speed(
 365                                 bfa_os_ntohs(rpsc2_acc->port_info[0].speed));
 366
 367                         bfa_sm_send_event(rpf, RPFSM_EVENT_RPSC_COMP);
 368                 }
 369         } else {
 370                 ls_rjt = (struct fc_ls_rjt_s *) BFA_FCXP_RSP_PLD(fcxp);
 371                 bfa_trc(rport->fcs, ls_rjt->reason_code);
 372                 bfa_trc(rport->fcs, ls_rjt->reason_code_expl);
 373                 rport->stats.rpsc_rejects++;
 374                 if (ls_rjt->reason_code == FC_LS_RJT_RSN_CMD_NOT_SUPP)
 375                         bfa_sm_send_event(rpf, RPFSM_EVENT_RPSC_FAIL);
 376                 else
 377                         bfa_sm_send_event(rpf, RPFSM_EVENT_RPSC_ERROR);
 378         }
 379 }