drivers/scsi/bfa/loop.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  *  port_loop.c vport private loop implementation.
  20  */
  21 #include <bfa.h>
  22 #include <bfa_svc.h>
  23 #include "fcs_lport.h"
  24 #include "fcs_rport.h"
  25 #include "fcs_trcmod.h"
  26 #include "lport_priv.h"
  27
  28 BFA_TRC_FILE(FCS, LOOP);
  29
  30 /**
  31  *   ALPA to LIXA bitmap mapping
  32  *
  33  *   ALPA 0x00 (Word 0, Bit 30) is invalid for N_Ports. Also Word 0 Bit 31
  34  * is for L_bit (login required) and is filled as ALPA 0x00 here.
  35  */
  36 static const u8   port_loop_alpa_map[] = {
  37         0xEF, 0xE8, 0xE4, 0xE2, 0xE1, 0xE0, 0xDC, 0xDA, /* Word 3 Bits 0..7 */
  38         0xD9, 0xD6, 0xD5, 0xD4, 0xD3, 0xD2, 0xD1, 0xCE, /* Word 3 Bits 8..15 */
  39         0xCD, 0xCC, 0xCB, 0xCA, 0xC9, 0xC7, 0xC6, 0xC5, /* Word 3 Bits 16..23 */
  40         0xC3, 0xBC, 0xBA, 0xB9, 0xB6, 0xB5, 0xB4, 0xB3, /* Word 3 Bits 24..31 */
  41
  42         0xB2, 0xB1, 0xAE, 0xAD, 0xAC, 0xAB, 0xAA, 0xA9, /* Word 2 Bits 0..7 */
  43         0xA7, 0xA6, 0xA5, 0xA3, 0x9F, 0x9E, 0x9D, 0x9B, /* Word 2 Bits 8..15 */
  44         0x98, 0x97, 0x90, 0x8F, 0x88, 0x84, 0x82, 0x81, /* Word 2 Bits 16..23 */
  45         0x80, 0x7C, 0x7A, 0x79, 0x76, 0x75, 0x74, 0x73, /* Word 2 Bits 24..31 */
  46
  47         0x72, 0x71, 0x6E, 0x6D, 0x6C, 0x6B, 0x6A, 0x69, /* Word 1 Bits 0..7 */
  48         0x67, 0x66, 0x65, 0x63, 0x5C, 0x5A, 0x59, 0x56, /* Word 1 Bits 8..15 */
  49         0x55, 0x54, 0x53, 0x52, 0x51, 0x4E, 0x4D, 0x4C, /* Word 1 Bits 16..23 */
  50         0x4B, 0x4A, 0x49, 0x47, 0x46, 0x45, 0x43, 0x3C, /* Word 1 Bits 24..31 */
  51
  52         0x3A, 0x39, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31, /* Word 0 Bits 0..7 */
  53         0x2E, 0x2D, 0x2C, 0x2B, 0x2A, 0x29, 0x27, 0x26, /* Word 0 Bits 8..15 */
  54         0x25, 0x23, 0x1F, 0x1E, 0x1D, 0x1B, 0x18, 0x17, /* Word 0 Bits 16..23 */
  55         0x10, 0x0F, 0x08, 0x04, 0x02, 0x01, 0x00, 0x00, /* Word 0 Bits 24..31 */
  56 };
  57
  58 /*
  59  * Local Functions
  60  */
  61 bfa_status_t    bfa_fcs_port_loop_send_plogi(struct bfa_fcs_port_s *port,
  62                                              u8 alpa);
  63
  64 void            bfa_fcs_port_loop_plogi_response(void *fcsarg,
  65                                                  struct bfa_fcxp_s *fcxp,
  66                                                  void *cbarg,
  67                                                  bfa_status_t req_status,
  68                                                  u32 rsp_len,
  69                                                  u32 resid_len,
  70                                                  struct fchs_s *rsp_fchs);
  71
  72 bfa_status_t    bfa_fcs_port_loop_send_adisc(struct bfa_fcs_port_s *port,
  73                                              u8 alpa);
  74
  75 void            bfa_fcs_port_loop_adisc_response(void *fcsarg,
  76                                                  struct bfa_fcxp_s *fcxp,
  77                                                  void *cbarg,
  78                                                  bfa_status_t req_status,
  79                                                  u32 rsp_len,
  80                                                  u32 resid_len,
  81                                                  struct fchs_s *rsp_fchs);
  82
  83 bfa_status_t    bfa_fcs_port_loop_send_plogi_acc(struct bfa_fcs_port_s *port,
  84                                                  u8 alpa);
  85
  86 void            bfa_fcs_port_loop_plogi_acc_response(void *fcsarg,
  87                                                      struct bfa_fcxp_s *fcxp,
  88                                                      void *cbarg,
  89                                                      bfa_status_t req_status,
  90                                                      u32 rsp_len,
  91                                                      u32 resid_len,
  92                                                      struct fchs_s *rsp_fchs);
  93
  94 bfa_status_t    bfa_fcs_port_loop_send_adisc_acc(struct bfa_fcs_port_s *port,
  95                                                  u8 alpa);
  96
  97 void            bfa_fcs_port_loop_adisc_acc_response(void *fcsarg,
  98                                                      struct bfa_fcxp_s *fcxp,
  99                                                      void *cbarg,
 100                                                      bfa_status_t req_status,
 101                                                      u32 rsp_len,
 102                                                      u32 resid_len,
 103                                                      struct fchs_s *rsp_fchs);
 104 /**
 105  *   Called by port to initializar in provate LOOP topology.
 106  */
 107 void
 108 bfa_fcs_port_loop_init(struct bfa_fcs_port_s *port)
 109 {
 110 }
 111
 112 /**
 113  *   Called by port to notify transition to online state.
 114  */
 115 void
 116 bfa_fcs_port_loop_online(struct bfa_fcs_port_s *port)
 117 {
 118
 119         u8         num_alpa = port->port_topo.ploop.num_alpa;
 120         u8        *alpa_pos_map = port->port_topo.ploop.alpa_pos_map;
 121         struct bfa_fcs_rport_s *r_port;
 122         int             ii = 0;
 123
 124         /*
 125          * If the port role is Initiator Mode, create Rports.
 126          */
 127         if (port->port_cfg.roles == BFA_PORT_ROLE_FCP_IM) {
 128                 /*
 129                  * Check if the ALPA positional bitmap is available.
 130                  * if not, we send PLOGI to all possible ALPAs.
 131                  */
 132                 if (num_alpa > 0) {
 133                         for (ii = 0; ii < num_alpa; ii++) {
 134                                 /*
 135                                  * ignore ALPA of bfa port
 136                                  */
 137                                 if (alpa_pos_map[ii] != port->pid) {
 138                                         r_port = bfa_fcs_rport_create(port,
 139                                                 alpa_pos_map[ii]);
 140                                 }
 141                         }
 142                 } else {
 143                         for (ii = 0; ii < MAX_ALPA_COUNT; ii++) {
 144                                 /*
 145                                  * ignore ALPA of bfa port
 146                                  */
 147                                 if ((port_loop_alpa_map[ii] > 0)
 148                                     && (port_loop_alpa_map[ii] != port->pid))
 149                                         bfa_fcs_port_loop_send_plogi(port,
 150                                                 port_loop_alpa_map[ii]);
 151                                 /**TBD */
 152                         }
 153                 }
 154         } else {
 155                 /*
 156                  * TBD Target Mode ??
 157                  */
 158         }
 159
 160 }
 161
 162 /**
 163  *   Called by port to notify transition to offline state.
 164  */
 165 void
 166 bfa_fcs_port_loop_offline(struct bfa_fcs_port_s *port)
 167 {
 168
 169 }
 170
 171 /**
 172  *   Called by port to notify a LIP on the loop.
 173  */
 174 void
 175 bfa_fcs_port_loop_lip(struct bfa_fcs_port_s *port)
 176 {
 177 }
 178
 179 /**
 180  * Local Functions.
 181  */
 182 bfa_status_t
 183 bfa_fcs_port_loop_send_plogi(struct bfa_fcs_port_s *port, u8 alpa)
 184 {
 185         struct fchs_s          fchs;
 186         struct bfa_fcxp_s *fcxp = NULL;
 187         int             len;
 188
 189         bfa_trc(port->fcs, alpa);
 190
 191         fcxp = bfa_fcxp_alloc(NULL, port->fcs->bfa, 0, 0, NULL, NULL, NULL,
 192                                   NULL);
 193         bfa_assert(fcxp);
 194
 195         len = fc_plogi_build(&fchs, bfa_fcxp_get_reqbuf(fcxp), alpa,
 196                              bfa_fcs_port_get_fcid(port), 0,
 197                              port->port_cfg.pwwn, port->port_cfg.nwwn,
 198                                  bfa_pport_get_maxfrsize(port->fcs->bfa));
 199
 200         bfa_fcxp_send(fcxp, NULL, port->fabric->vf_id, port->lp_tag, BFA_FALSE,
 201                           FC_CLASS_3, len, &fchs,
 202                           bfa_fcs_port_loop_plogi_response, (void *)port,
 203                           FC_MAX_PDUSZ, FC_RA_TOV);
 204
 205         return BFA_STATUS_OK;
 206 }
 207
 208 /**
 209  *   Called by fcxp to notify the Plogi response
 210  */
 211 void
 212 bfa_fcs_port_loop_plogi_response(void *fcsarg, struct bfa_fcxp_s *fcxp,
 213                                  void *cbarg, bfa_status_t req_status,
 214                                  u32 rsp_len, u32 resid_len,
 215                                  struct fchs_s *rsp_fchs)
 216 {
 217         struct bfa_fcs_port_s *port = (struct bfa_fcs_port_s *) cbarg;
 218         struct fc_logi_s     *plogi_resp;
 219         struct fc_els_cmd_s   *els_cmd;
 220
 221         bfa_trc(port->fcs, req_status);
 222
 223         /*
 224          * Sanity Checks
 225          */
 226         if (req_status != BFA_STATUS_OK) {
 227                 bfa_trc(port->fcs, req_status);
 228                 /*
 229                  * @todo
 230                  * This could mean that the device with this APLA does not
 231                  * exist on the loop.
 232                  */
 233
 234                 return;
 235         }
 236
 237         els_cmd = (struct fc_els_cmd_s *) BFA_FCXP_RSP_PLD(fcxp);
 238         plogi_resp = (struct fc_logi_s *) els_cmd;
 239
 240         if (els_cmd->els_code == FC_ELS_ACC) {
 241                 bfa_fcs_rport_start(port, rsp_fchs, plogi_resp);
 242         } else {
 243                 bfa_trc(port->fcs, plogi_resp->els_cmd.els_code);
 244                 bfa_assert(0);
 245         }
 246 }
 247
 248 bfa_status_t
 249 bfa_fcs_port_loop_send_plogi_acc(struct bfa_fcs_port_s *port, u8 alpa)
 250 {
 251         struct fchs_s          fchs;
 252         struct bfa_fcxp_s *fcxp;
 253         int             len;
 254
 255         bfa_trc(port->fcs, alpa);
 256
 257         fcxp = bfa_fcxp_alloc(NULL, port->fcs->bfa, 0, 0, NULL, NULL, NULL,
 258                                   NULL);
 259         bfa_assert(fcxp);
 260
 261         len = fc_plogi_acc_build(&fchs, bfa_fcxp_get_reqbuf(fcxp), alpa,
 262                                  bfa_fcs_port_get_fcid(port), 0,
 263                                  port->port_cfg.pwwn, port->port_cfg.nwwn,
 264                                  bfa_pport_get_maxfrsize(port->fcs->bfa));
 265
 266         bfa_fcxp_send(fcxp, NULL, port->fabric->vf_id, port->lp_tag, BFA_FALSE,
 267                                  FC_CLASS_3, len, &fchs,
 268                                  bfa_fcs_port_loop_plogi_acc_response,
 269                                  (void *)port, FC_MAX_PDUSZ, 0); /* No response
 270                                                                   * expected
 271                                                                   */
 272
 273         return BFA_STATUS_OK;
 274 }
 275
 276 /*
 277  *  Plogi Acc Response
 278  * We donot do any processing here.
 279  */
 280 void
 281 bfa_fcs_port_loop_plogi_acc_response(void *fcsarg, struct bfa_fcxp_s *fcxp,
 282                                      void *cbarg, bfa_status_t req_status,
 283                                      u32 rsp_len, u32 resid_len,
 284                                      struct fchs_s *rsp_fchs)
 285 {
 286
 287         struct bfa_fcs_port_s *port = (struct bfa_fcs_port_s *) cbarg;
 288
 289         bfa_trc(port->fcs, port->pid);
 290
 291         /*
 292          * Sanity Checks
 293          */
 294         if (req_status != BFA_STATUS_OK) {
 295                 bfa_trc(port->fcs, req_status);
 296                 return;
 297         }
 298 }
 299
 300 bfa_status_t
 301 bfa_fcs_port_loop_send_adisc(struct bfa_fcs_port_s *port, u8 alpa)
 302 {
 303         struct fchs_s          fchs;
 304         struct bfa_fcxp_s *fcxp;
 305         int             len;
 306
 307         bfa_trc(port->fcs, alpa);
 308
 309         fcxp = bfa_fcxp_alloc(NULL, port->fcs->bfa, 0, 0, NULL, NULL, NULL,
 310                                   NULL);
 311         bfa_assert(fcxp);
 312
 313         len = fc_adisc_build(&fchs, bfa_fcxp_get_reqbuf(fcxp), alpa,
 314                              bfa_fcs_port_get_fcid(port), 0,
 315                              port->port_cfg.pwwn, port->port_cfg.nwwn);
 316
 317         bfa_fcxp_send(fcxp, NULL, port->fabric->vf_id, port->lp_tag, BFA_FALSE,
 318                           FC_CLASS_3, len, &fchs,
 319                           bfa_fcs_port_loop_adisc_response, (void *)port,
 320                           FC_MAX_PDUSZ, FC_RA_TOV);
 321
 322         return BFA_STATUS_OK;
 323 }
 324
 325 /**
 326  *   Called by fcxp to notify the ADISC response
 327  */
 328 void
 329 bfa_fcs_port_loop_adisc_response(void *fcsarg, struct bfa_fcxp_s *fcxp,
 330                                  void *cbarg, bfa_status_t req_status,
 331                                  u32 rsp_len, u32 resid_len,
 332                                  struct fchs_s *rsp_fchs)
 333 {
 334         struct bfa_fcs_port_s *port = (struct bfa_fcs_port_s *) cbarg;
 335         struct bfa_fcs_rport_s *rport;
 336         struct fc_adisc_s     *adisc_resp;
 337         struct fc_els_cmd_s   *els_cmd;
 338         u32        pid = rsp_fchs->s_id;
 339
 340         bfa_trc(port->fcs, req_status);
 341
 342         /*
 343          * Sanity Checks
 344          */
 345         if (req_status != BFA_STATUS_OK) {
 346                 /*
 347                  * TBD : we may need to retry certain requests
 348                  */
 349                 bfa_fcxp_free(fcxp);
 350                 return;
 351         }
 352
 353         els_cmd = (struct fc_els_cmd_s *) BFA_FCXP_RSP_PLD(fcxp);
 354         adisc_resp = (struct fc_adisc_s *) els_cmd;
 355
 356         if (els_cmd->els_code == FC_ELS_ACC) {
 357         } else {
 358                 bfa_trc(port->fcs, adisc_resp->els_cmd.els_code);
 359
 360                 /*
 361                  * TBD: we may need to check for reject codes and retry
 362                  */
 363                 rport = bfa_fcs_port_get_rport_by_pid(port, pid);
 364                 if (rport) {
 365                         list_del(&rport->qe);
 366                         bfa_fcs_rport_delete(rport);
 367                 }
 368
 369         }
 370         return;
 371 }
 372
 373 bfa_status_t
 374 bfa_fcs_port_loop_send_adisc_acc(struct bfa_fcs_port_s *port, u8 alpa)
 375 {
 376         struct fchs_s          fchs;
 377         struct bfa_fcxp_s *fcxp;
 378         int             len;
 379
 380         bfa_trc(port->fcs, alpa);
 381
 382         fcxp = bfa_fcxp_alloc(NULL, port->fcs->bfa, 0, 0, NULL, NULL, NULL,
 383                                   NULL);
 384         bfa_assert(fcxp);
 385
 386         len = fc_adisc_acc_build(&fchs, bfa_fcxp_get_reqbuf(fcxp), alpa,
 387                                  bfa_fcs_port_get_fcid(port), 0,
 388                                  port->port_cfg.pwwn, port->port_cfg.nwwn);
 389
 390         bfa_fcxp_send(fcxp, NULL, port->fabric->vf_id, port->lp_tag, BFA_FALSE,
 391                                 FC_CLASS_3, len, &fchs,
 392                                 bfa_fcs_port_loop_adisc_acc_response,
 393                                 (void *)port, FC_MAX_PDUSZ, 0); /* no reponse
 394                                                                  * expected
 395                                                                  */
 396
 397         return BFA_STATUS_OK;
 398 }
 399
 400 /*
 401  *  Adisc Acc Response
 402  * We donot do any processing here.
 403  */
 404 void
 405 bfa_fcs_port_loop_adisc_acc_response(void *fcsarg, struct bfa_fcxp_s *fcxp,
 406                                      void *cbarg, bfa_status_t req_status,
 407                                      u32 rsp_len, u32 resid_len,
 408                                      struct fchs_s *rsp_fchs)
 409 {
 410
 411         struct bfa_fcs_port_s *port = (struct bfa_fcs_port_s *) cbarg;
 412
 413         bfa_trc(port->fcs, port->pid);
 414
 415         /*
 416          * Sanity Checks
 417          */
 418         if (req_status != BFA_STATUS_OK) {
 419                 bfa_trc(port->fcs, req_status);
 420                 return;
 421         }
 422 }