drivers/scsi/lpfc/lpfc_mbox.c

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2004-2005 Emulex.  All rights reserved.           *
   5  * EMULEX and SLI are trademarks of Emulex.                        *
   6  * www.emulex.com                                                  *
   7  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
   8  *                                                                 *
   9  * This program is free software; you can redistribute it and/or   *
  10  * modify it under the terms of version 2 of the GNU General       *
  11  * Public License as published by the Free Software Foundation.    *
  12  * This program is distributed in the hope that it will be useful. *
  13  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  14  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  15  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  16  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  17  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  18  * more details, a copy of which can be found in the file COPYING  *
  19  * included with this package.                                     *
  20  *******************************************************************/
  21
  22 #include <linux/blkdev.h>
  23 #include <linux/pci.h>
  24 #include <linux/interrupt.h>
  25
  26 #include "lpfc_hw.h"
  27 #include "lpfc_sli.h"
  28 #include "lpfc_disc.h"
  29 #include "lpfc_scsi.h"
  30 #include "lpfc.h"
  31 #include "lpfc_logmsg.h"
  32 #include "lpfc_crtn.h"
  33 #include "lpfc_compat.h"
  34
  35 /**********************************************/
  36
  37 /*                mailbox command             */
  38 /**********************************************/
  39 void
  40 lpfc_dump_mem(struct lpfc_hba * phba, LPFC_MBOXQ_t * pmb, uint16_t offset)
  41 {
  42         MAILBOX_t *mb;
  43         void *ctx;
  44
  45         mb = &pmb->mb;
  46         ctx = pmb->context2;
  47
  48         /* Setup to dump VPD region */
  49         memset(pmb, 0, sizeof (LPFC_MBOXQ_t));
  50         mb->mbxCommand = MBX_DUMP_MEMORY;
  51         mb->un.varDmp.cv = 1;
  52         mb->un.varDmp.type = DMP_NV_PARAMS;
  53         mb->un.varDmp.entry_index = offset;
  54         mb->un.varDmp.region_id = DMP_REGION_VPD;
  55         mb->un.varDmp.word_cnt = (DMP_RSP_SIZE / sizeof (uint32_t));
  56         mb->un.varDmp.co = 0;
  57         mb->un.varDmp.resp_offset = 0;
  58         pmb->context2 = ctx;
  59         mb->mbxOwner = OWN_HOST;
  60         return;
  61 }
  62
  63 /**********************************************/
  64 /*  lpfc_read_nv  Issue a READ NVPARAM        */
  65 /*                mailbox command             */
  66 /**********************************************/
  67 void
  68 lpfc_read_nv(struct lpfc_hba * phba, LPFC_MBOXQ_t * pmb)
  69 {
  70         MAILBOX_t *mb;
  71
  72         mb = &pmb->mb;
  73         memset(pmb, 0, sizeof (LPFC_MBOXQ_t));
  74         mb->mbxCommand = MBX_READ_NV;
  75         mb->mbxOwner = OWN_HOST;
  76         return;
  77 }
  78
  79 /**********************************************/
  80 /*  lpfc_read_la  Issue a READ LA             */
  81 /*                mailbox command             */
  82 /**********************************************/
  83 int
  84 lpfc_read_la(struct lpfc_hba * phba, LPFC_MBOXQ_t * pmb, struct lpfc_dmabuf *mp)
  85 {
  86         MAILBOX_t *mb;
  87         struct lpfc_sli *psli;
  88
  89         psli = &phba->sli;
  90         mb = &pmb->mb;
  91         memset(pmb, 0, sizeof (LPFC_MBOXQ_t));
  92
  93         INIT_LIST_HEAD(&mp->list);
  94         mb->mbxCommand = MBX_READ_LA64;
  95         mb->un.varReadLA.un.lilpBde64.tus.f.bdeSize = 128;
  96         mb->un.varReadLA.un.lilpBde64.addrHigh = putPaddrHigh(mp->phys);
  97         mb->un.varReadLA.un.lilpBde64.addrLow = putPaddrLow(mp->phys);
  98
  99         /* Save address for later completion and set the owner to host so that
 100          * the FW knows this mailbox is available for processing.
 101          */
 102         pmb->context1 = (uint8_t *) mp;
 103         mb->mbxOwner = OWN_HOST;
 104         return (0);
 105 }
 106
 107 /**********************************************/
 108 /*  lpfc_clear_la  Issue a CLEAR LA           */
 109 /*                 mailbox command            */
 110 /**********************************************/
 111 void
 112 lpfc_clear_la(struct lpfc_hba * phba, LPFC_MBOXQ_t * pmb)
 113 {
 114         MAILBOX_t *mb;
 115
 116         mb = &pmb->mb;
 117         memset(pmb, 0, sizeof (LPFC_MBOXQ_t));
 118
 119         mb->un.varClearLA.eventTag = phba->fc_eventTag;
 120         mb->mbxCommand = MBX_CLEAR_LA;
 121         mb->mbxOwner = OWN_HOST;
 122         return;
 123 }
 124
 125 /**************************************************/
 126 /*  lpfc_config_link  Issue a CONFIG LINK         */
 127 /*                    mailbox command             */
 128 /**************************************************/
 129 void
 130 lpfc_config_link(struct lpfc_hba * phba, LPFC_MBOXQ_t * pmb)
 131 {
 132         MAILBOX_t *mb = &pmb->mb;
 133         memset(pmb, 0, sizeof (LPFC_MBOXQ_t));
 134
 135         /* NEW_FEATURE
 136          * SLI-2, Coalescing Response Feature.
 137          */
 138         if (phba->cfg_cr_delay) {
 139                 mb->un.varCfgLnk.cr = 1;
 140                 mb->un.varCfgLnk.ci = 1;
 141                 mb->un.varCfgLnk.cr_delay = phba->cfg_cr_delay;
 142                 mb->un.varCfgLnk.cr_count = phba->cfg_cr_count;
 143         }
 144
 145         mb->un.varCfgLnk.myId = phba->fc_myDID;
 146         mb->un.varCfgLnk.edtov = phba->fc_edtov;
 147         mb->un.varCfgLnk.arbtov = phba->fc_arbtov;
 148         mb->un.varCfgLnk.ratov = phba->fc_ratov;
 149         mb->un.varCfgLnk.rttov = phba->fc_rttov;
 150         mb->un.varCfgLnk.altov = phba->fc_altov;
 151         mb->un.varCfgLnk.crtov = phba->fc_crtov;
 152         mb->un.varCfgLnk.citov = phba->fc_citov;
 153
 154         if (phba->cfg_ack0)
 155                 mb->un.varCfgLnk.ack0_enable = 1;
 156
 157         mb->mbxCommand = MBX_CONFIG_LINK;
 158         mb->mbxOwner = OWN_HOST;
 159         return;
 160 }
 161
 162 /**********************************************/
 163 /*  lpfc_init_link  Issue an INIT LINK        */
 164 /*                  mailbox command           */
 165 /**********************************************/
 166 void
 167 lpfc_init_link(struct lpfc_hba * phba,
 168                LPFC_MBOXQ_t * pmb, uint32_t topology, uint32_t linkspeed)
 169 {
 170         lpfc_vpd_t *vpd;
 171         struct lpfc_sli *psli;
 172         MAILBOX_t *mb;
 173
 174         mb = &pmb->mb;
 175         memset(pmb, 0, sizeof (LPFC_MBOXQ_t));
 176
 177         psli = &phba->sli;
 178         switch (topology) {
 179         case FLAGS_TOPOLOGY_MODE_LOOP_PT:
 180                 mb->un.varInitLnk.link_flags = FLAGS_TOPOLOGY_MODE_LOOP;
 181                 mb->un.varInitLnk.link_flags |= FLAGS_TOPOLOGY_FAILOVER;
 182                 break;
 183         case FLAGS_TOPOLOGY_MODE_PT_PT:
 184                 mb->un.varInitLnk.link_flags = FLAGS_TOPOLOGY_MODE_PT_PT;
 185                 break;
 186         case FLAGS_TOPOLOGY_MODE_LOOP:
 187                 mb->un.varInitLnk.link_flags = FLAGS_TOPOLOGY_MODE_LOOP;
 188                 break;
 189         case FLAGS_TOPOLOGY_MODE_PT_LOOP:
 190                 mb->un.varInitLnk.link_flags = FLAGS_TOPOLOGY_MODE_PT_PT;
 191                 mb->un.varInitLnk.link_flags |= FLAGS_TOPOLOGY_FAILOVER;
 192                 break;
 193         }
 194
 195         /* NEW_FEATURE
 196          * Setting up the link speed
 197          */
 198         vpd = &phba->vpd;
 199         if (vpd->rev.feaLevelHigh >= 0x02){
 200                 switch(linkspeed){
 201                         case LINK_SPEED_1G:
 202                         case LINK_SPEED_2G:
 203                         case LINK_SPEED_4G:
 204                                 mb->un.varInitLnk.link_flags |=
 205                                                         FLAGS_LINK_SPEED;
 206                                 mb->un.varInitLnk.link_speed = linkspeed;
 207                         break;
 208                         case LINK_SPEED_AUTO:
 209                         default:
 210                                 mb->un.varInitLnk.link_speed =
 211                                                         LINK_SPEED_AUTO;
 212                         break;
 213                 }
 214
 215         }
 216         else
 217                 mb->un.varInitLnk.link_speed = LINK_SPEED_AUTO;
 218
 219         mb->mbxCommand = (volatile uint8_t)MBX_INIT_LINK;
 220         mb->mbxOwner = OWN_HOST;
 221         mb->un.varInitLnk.fabric_AL_PA = phba->fc_pref_ALPA;
 222         return;
 223 }
 224
 225 /**********************************************/
 226 /*  lpfc_read_sparam  Issue a READ SPARAM     */
 227 /*                    mailbox command         */
 228 /**********************************************/
 229 int
 230 lpfc_read_sparam(struct lpfc_hba * phba, LPFC_MBOXQ_t * pmb)
 231 {
 232         struct lpfc_dmabuf *mp;
 233         MAILBOX_t *mb;
 234         struct lpfc_sli *psli;
 235
 236         psli = &phba->sli;
 237         mb = &pmb->mb;
 238         memset(pmb, 0, sizeof (LPFC_MBOXQ_t));
 239
 240         mb->mbxOwner = OWN_HOST;
 241
 242         /* Get a buffer to hold the HBAs Service Parameters */
 243
 244         if (((mp = kmalloc(sizeof (struct lpfc_dmabuf), GFP_KERNEL)) == 0) ||
 245             ((mp->virt = lpfc_mbuf_alloc(phba, 0, &(mp->phys))) == 0)) {
 246                 if (mp)
 247                         kfree(mp);
 248                 mb->mbxCommand = MBX_READ_SPARM64;
 249                 /* READ_SPARAM: no buffers */
 250                 lpfc_printf_log(phba,
 251                                 KERN_WARNING,
 252                                 LOG_MBOX,
 253                                 "%d:0301 READ_SPARAM: no buffers\n",
 254                                 phba->brd_no);
 255                 return (1);
 256         }
 257         INIT_LIST_HEAD(&mp->list);
 258         mb->mbxCommand = MBX_READ_SPARM64;
 259         mb->un.varRdSparm.un.sp64.tus.f.bdeSize = sizeof (struct serv_parm);
 260         mb->un.varRdSparm.un.sp64.addrHigh = putPaddrHigh(mp->phys);
 261         mb->un.varRdSparm.un.sp64.addrLow = putPaddrLow(mp->phys);
 262
 263         /* save address for completion */
 264         pmb->context1 = mp;
 265
 266         return (0);
 267 }
 268
 269 /********************************************/
 270 /*  lpfc_unreg_did  Issue a UNREG_DID       */
 271 /*                  mailbox command         */
 272 /********************************************/
 273 void
 274 lpfc_unreg_did(struct lpfc_hba * phba, uint32_t did, LPFC_MBOXQ_t * pmb)
 275 {
 276         MAILBOX_t *mb;
 277
 278         mb = &pmb->mb;
 279         memset(pmb, 0, sizeof (LPFC_MBOXQ_t));
 280
 281         mb->un.varUnregDID.did = did;
 282
 283         mb->mbxCommand = MBX_UNREG_D_ID;
 284         mb->mbxOwner = OWN_HOST;
 285         return;
 286 }
 287
 288 /***********************************************/
 289
 290 /*                  command to write slim      */
 291 /***********************************************/
 292 void
 293 lpfc_set_slim(struct lpfc_hba * phba, LPFC_MBOXQ_t * pmb, uint32_t addr,
 294               uint32_t value)
 295 {
 296         MAILBOX_t *mb;
 297
 298         mb = &pmb->mb;
 299         memset(pmb, 0, sizeof (LPFC_MBOXQ_t));
 300
 301         /* addr = 0x090597 is AUTO ABTS disable for ELS commands */
 302         /* addr = 0x052198 is DELAYED ABTS enable for ELS commands */
 303
 304         /*
 305          * Always turn on DELAYED ABTS for ELS timeouts
 306          */
 307         if ((addr == 0x052198) && (value == 0))
 308                 value = 1;
 309
 310         mb->un.varWords[0] = addr;
 311         mb->un.varWords[1] = value;
 312
 313         mb->mbxCommand = MBX_SET_SLIM;
 314         mb->mbxOwner = OWN_HOST;
 315         return;
 316 }
 317
 318 /**********************************************/
 319 /*  lpfc_read_nv  Issue a READ CONFIG         */
 320 /*                mailbox command             */
 321 /**********************************************/
 322 void
 323 lpfc_read_config(struct lpfc_hba * phba, LPFC_MBOXQ_t * pmb)
 324 {
 325         MAILBOX_t *mb;
 326
 327         mb = &pmb->mb;
 328         memset(pmb, 0, sizeof (LPFC_MBOXQ_t));
 329
 330         mb->mbxCommand = MBX_READ_CONFIG;
 331         mb->mbxOwner = OWN_HOST;
 332         return;
 333 }
 334
 335 /********************************************/
 336 /*  lpfc_reg_login  Issue a REG_LOGIN       */
 337 /*                  mailbox command         */
 338 /********************************************/
 339 int
 340 lpfc_reg_login(struct lpfc_hba * phba,
 341                uint32_t did, uint8_t * param, LPFC_MBOXQ_t * pmb, uint32_t flag)
 342 {
 343         uint8_t *sparam;
 344         struct lpfc_dmabuf *mp;
 345         MAILBOX_t *mb;
 346         struct lpfc_sli *psli;
 347
 348         psli = &phba->sli;
 349         mb = &pmb->mb;
 350         memset(pmb, 0, sizeof (LPFC_MBOXQ_t));
 351
 352         mb->un.varRegLogin.rpi = 0;
 353         mb->un.varRegLogin.did = did;
 354         mb->un.varWords[30] = flag;     /* Set flag to issue action on cmpl */
 355
 356         mb->mbxOwner = OWN_HOST;
 357
 358         /* Get a buffer to hold NPorts Service Parameters */
 359         if (((mp = kmalloc(sizeof (struct lpfc_dmabuf), GFP_KERNEL)) == NULL) ||
 360             ((mp->virt = lpfc_mbuf_alloc(phba, 0, &(mp->phys))) == 0)) {
 361                 if (mp)
 362                         kfree(mp);
 363
 364                 mb->mbxCommand = MBX_REG_LOGIN64;
 365                 /* REG_LOGIN: no buffers */
 366                 lpfc_printf_log(phba,
 367                                KERN_WARNING,
 368                                LOG_MBOX,
 369                                "%d:0302 REG_LOGIN: no buffers Data x%x x%x\n",
 370                                phba->brd_no,
 371                                (uint32_t) did, (uint32_t) flag);
 372                 return (1);
 373         }
 374         INIT_LIST_HEAD(&mp->list);
 375         sparam = mp->virt;
 376
 377         /* Copy param's into a new buffer */
 378         memcpy(sparam, param, sizeof (struct serv_parm));
 379
 380         /* save address for completion */
 381         pmb->context1 = (uint8_t *) mp;
 382
 383         mb->mbxCommand = MBX_REG_LOGIN64;
 384         mb->un.varRegLogin.un.sp64.tus.f.bdeSize = sizeof (struct serv_parm);
 385         mb->un.varRegLogin.un.sp64.addrHigh = putPaddrHigh(mp->phys);
 386         mb->un.varRegLogin.un.sp64.addrLow = putPaddrLow(mp->phys);
 387
 388         return (0);
 389 }
 390
 391 /**********************************************/
 392 /*  lpfc_unreg_login  Issue a UNREG_LOGIN     */
 393 /*                    mailbox command         */
 394 /**********************************************/
 395 void
 396 lpfc_unreg_login(struct lpfc_hba * phba, uint32_t rpi, LPFC_MBOXQ_t * pmb)
 397 {
 398         MAILBOX_t *mb;
 399
 400         mb = &pmb->mb;
 401         memset(pmb, 0, sizeof (LPFC_MBOXQ_t));
 402
 403         mb->un.varUnregLogin.rpi = (uint16_t) rpi;
 404         mb->un.varUnregLogin.rsvd1 = 0;
 405
 406         mb->mbxCommand = MBX_UNREG_LOGIN;
 407         mb->mbxOwner = OWN_HOST;
 408         return;
 409 }
 410
 411 static void
 412 lpfc_config_pcb_setup(struct lpfc_hba * phba)
 413 {
 414         struct lpfc_sli *psli = &phba->sli;
 415         struct lpfc_sli_ring *pring;
 416         PCB_t *pcbp = &phba->slim2p->pcb;
 417         dma_addr_t pdma_addr;
 418         uint32_t offset;
 419         uint32_t iocbCnt;
 420         int i;
 421
 422         pcbp->maxRing = (psli->num_rings - 1);
 423
 424         iocbCnt = 0;
 425         for (i = 0; i < psli->num_rings; i++) {
 426                 pring = &psli->ring[i];
 427                 /* A ring MUST have both cmd and rsp entries defined to be
 428                    valid */
 429                 if ((pring->numCiocb == 0) || (pring->numRiocb == 0)) {
 430                         pcbp->rdsc[i].cmdEntries = 0;
 431                         pcbp->rdsc[i].rspEntries = 0;
 432                         pcbp->rdsc[i].cmdAddrHigh = 0;
 433                         pcbp->rdsc[i].rspAddrHigh = 0;
 434                         pcbp->rdsc[i].cmdAddrLow = 0;
 435                         pcbp->rdsc[i].rspAddrLow = 0;
 436                         pring->cmdringaddr = NULL;
 437                         pring->rspringaddr = NULL;
 438                         continue;
 439                 }
 440                 /* Command ring setup for ring */
 441                 pring->cmdringaddr =
 442                     (void *)&phba->slim2p->IOCBs[iocbCnt];
 443                 pcbp->rdsc[i].cmdEntries = pring->numCiocb;
 444
 445                 offset = (uint8_t *)&phba->slim2p->IOCBs[iocbCnt] -
 446                          (uint8_t *)phba->slim2p;
 447                 pdma_addr = phba->slim2p_mapping + offset;
 448                 pcbp->rdsc[i].cmdAddrHigh = putPaddrHigh(pdma_addr);
 449                 pcbp->rdsc[i].cmdAddrLow = putPaddrLow(pdma_addr);
 450                 iocbCnt += pring->numCiocb;
 451
 452                 /* Response ring setup for ring */
 453                 pring->rspringaddr =
 454                     (void *)&phba->slim2p->IOCBs[iocbCnt];
 455
 456                 pcbp->rdsc[i].rspEntries = pring->numRiocb;
 457                 offset = (uint8_t *)&phba->slim2p->IOCBs[iocbCnt] -
 458                          (uint8_t *)phba->slim2p;
 459                 pdma_addr = phba->slim2p_mapping + offset;
 460                 pcbp->rdsc[i].rspAddrHigh = putPaddrHigh(pdma_addr);
 461                 pcbp->rdsc[i].rspAddrLow = putPaddrLow(pdma_addr);
 462                 iocbCnt += pring->numRiocb;
 463         }
 464 }
 465
 466 void
 467 lpfc_read_rev(struct lpfc_hba * phba, LPFC_MBOXQ_t * pmb)
 468 {
 469         MAILBOX_t *mb;
 470
 471         mb = &pmb->mb;
 472         memset(pmb, 0, sizeof (LPFC_MBOXQ_t));
 473         mb->un.varRdRev.cv = 1;
 474         mb->mbxCommand = MBX_READ_REV;
 475         mb->mbxOwner = OWN_HOST;
 476         return;
 477 }
 478
 479 void
 480 lpfc_config_ring(struct lpfc_hba * phba, int ring, LPFC_MBOXQ_t * pmb)
 481 {
 482         int i;
 483         MAILBOX_t *mb = &pmb->mb;
 484         struct lpfc_sli *psli;
 485         struct lpfc_sli_ring *pring;
 486
 487         memset(pmb, 0, sizeof (LPFC_MBOXQ_t));
 488
 489         mb->un.varCfgRing.ring = ring;
 490         mb->un.varCfgRing.maxOrigXchg = 0;
 491         mb->un.varCfgRing.maxRespXchg = 0;
 492         mb->un.varCfgRing.recvNotify = 1;
 493
 494         psli = &phba->sli;
 495         pring = &psli->ring[ring];
 496         mb->un.varCfgRing.numMask = pring->num_mask;
 497         mb->mbxCommand = MBX_CONFIG_RING;
 498         mb->mbxOwner = OWN_HOST;
 499
 500         /* Is this ring configured for a specific profile */
 501         if (pring->prt[0].profile) {
 502                 mb->un.varCfgRing.profile = pring->prt[0].profile;
 503                 return;
 504         }
 505
 506         /* Otherwise we setup specific rctl / type masks for this ring */
 507         for (i = 0; i < pring->num_mask; i++) {
 508                 mb->un.varCfgRing.rrRegs[i].rval = pring->prt[i].rctl;
 509                 if (mb->un.varCfgRing.rrRegs[i].rval != FC_ELS_REQ)
 510                         mb->un.varCfgRing.rrRegs[i].rmask = 0xff;
 511                 else
 512                         mb->un.varCfgRing.rrRegs[i].rmask = 0xfe;
 513                 mb->un.varCfgRing.rrRegs[i].tval = pring->prt[i].type;
 514                 mb->un.varCfgRing.rrRegs[i].tmask = 0xff;
 515         }
 516
 517         return;
 518 }
 519
 520 void
 521 lpfc_config_port(struct lpfc_hba * phba, LPFC_MBOXQ_t * pmb)
 522 {
 523         MAILBOX_t *mb = &pmb->mb;
 524         dma_addr_t pdma_addr;
 525         uint32_t bar_low, bar_high;
 526         size_t offset;
 527         struct lpfc_hgp hgp;
 528         void __iomem *to_slim;
 529
 530         memset(pmb, 0, sizeof(LPFC_MBOXQ_t));
 531         mb->mbxCommand = MBX_CONFIG_PORT;
 532         mb->mbxOwner = OWN_HOST;
 533
 534         mb->un.varCfgPort.pcbLen = sizeof(PCB_t);
 535
 536         offset = (uint8_t *)&phba->slim2p->pcb - (uint8_t *)phba->slim2p;
 537         pdma_addr = phba->slim2p_mapping + offset;
 538         mb->un.varCfgPort.pcbLow = putPaddrLow(pdma_addr);
 539         mb->un.varCfgPort.pcbHigh = putPaddrHigh(pdma_addr);
 540
 541         /* Now setup pcb */
 542         phba->slim2p->pcb.type = TYPE_NATIVE_SLI2;
 543         phba->slim2p->pcb.feature = FEATURE_INITIAL_SLI2;
 544
 545         /* Setup Mailbox pointers */
 546         phba->slim2p->pcb.mailBoxSize = sizeof(MAILBOX_t);
 547         offset = (uint8_t *)&phba->slim2p->mbx - (uint8_t *)phba->slim2p;
 548         pdma_addr = phba->slim2p_mapping + offset;
 549         phba->slim2p->pcb.mbAddrHigh = putPaddrHigh(pdma_addr);
 550         phba->slim2p->pcb.mbAddrLow = putPaddrLow(pdma_addr);
 551
 552         /*
 553          * Setup Host Group ring pointer.
 554          *
 555          * For efficiency reasons, the ring get/put pointers can be
 556          * placed in adapter memory (SLIM) rather than in host memory.
 557          * This allows firmware to avoid PCI reads/writes when updating
 558          * and checking pointers.
 559          *
 560          * The firmware recognizes the use of SLIM memory by comparing
 561          * the address of the get/put pointers structure with that of
 562          * the SLIM BAR (BAR0).
 563          *
 564          * Caution: be sure to use the PCI config space value of BAR0/BAR1
 565          * (the hardware's view of the base address), not the OS's
 566          * value of pci_resource_start() as the OS value may be a cookie
 567          * for ioremap/iomap.
 568          */
 569
 570
 571         pci_read_config_dword(phba->pcidev, PCI_BASE_ADDRESS_0, &bar_low);
 572         pci_read_config_dword(phba->pcidev, PCI_BASE_ADDRESS_1, &bar_high);
 573
 574
 575         /* mask off BAR0's flag bits 0 - 3 */
 576         phba->slim2p->pcb.hgpAddrLow = (bar_low & PCI_BASE_ADDRESS_MEM_MASK) +
 577                                         (SLIMOFF*sizeof(uint32_t));
 578         if (bar_low & PCI_BASE_ADDRESS_MEM_TYPE_64)
 579                 phba->slim2p->pcb.hgpAddrHigh = bar_high;
 580         else
 581                 phba->slim2p->pcb.hgpAddrHigh = 0;
 582         /* write HGP data to SLIM at the required longword offset */
 583         memset(&hgp, 0, sizeof(struct lpfc_hgp));
 584         to_slim = phba->MBslimaddr + (SLIMOFF*sizeof (uint32_t));
 585         lpfc_memcpy_to_slim(to_slim, &hgp, sizeof(struct lpfc_hgp));
 586
 587         /* Setup Port Group ring pointer */
 588         offset = (uint8_t *)&phba->slim2p->mbx.us.s2.port -
 589                  (uint8_t *)phba->slim2p;
 590         pdma_addr = phba->slim2p_mapping + offset;
 591         phba->slim2p->pcb.pgpAddrHigh = putPaddrHigh(pdma_addr);
 592         phba->slim2p->pcb.pgpAddrLow = putPaddrLow(pdma_addr);
 593
 594         /* Use callback routine to setp rings in the pcb */
 595         lpfc_config_pcb_setup(phba);
 596
 597         /* special handling for LC HBAs */
 598         if (lpfc_is_LC_HBA(phba->pcidev->device)) {
 599                 uint32_t hbainit[5];
 600
 601                 lpfc_hba_init(phba, hbainit);
 602
 603                 memcpy(&mb->un.varCfgPort.hbainit, hbainit, 20);
 604         }
 605
 606         /* Swap PCB if needed */
 607         lpfc_sli_pcimem_bcopy(&phba->slim2p->pcb, &phba->slim2p->pcb,
 608                                                                 sizeof (PCB_t));
 609
 610         lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
 611                         "%d:0405 Service Level Interface (SLI) 2 selected\n",
 612                         phba->brd_no);
 613 }
 614
 615 void
 616 lpfc_mbox_put(struct lpfc_hba * phba, LPFC_MBOXQ_t * mbq)
 617 {
 618         struct lpfc_sli *psli;
 619
 620         psli = &phba->sli;
 621
 622         list_add_tail(&mbq->list, &psli->mboxq);
 623
 624         psli->mboxq_cnt++;
 625
 626         return;
 627 }
 628
 629 LPFC_MBOXQ_t *
 630 lpfc_mbox_get(struct lpfc_hba * phba)
 631 {
 632         LPFC_MBOXQ_t *mbq = NULL;
 633         struct lpfc_sli *psli = &phba->sli;
 634
 635         list_remove_head((&psli->mboxq), mbq, LPFC_MBOXQ_t,
 636                          list);
 637         if (mbq) {
 638                 psli->mboxq_cnt--;
 639         }
 640
 641         return mbq;
 642 }